Home / 27,685.94-38,186.20-20,880.25

Finding the Fourth Proportional to 27,685.94, 38,186.20 and 20,880.25

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Solution

The fourth proportional to 27,685.94, 38,186.20 and 20,880.25 is: 28,799.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,685.94 : 38,186.20 = 20,880.25 : x
  2. Step 2: Convert to fraction form
    27,685.94/38,186.20 = 20,880.25/x
  3. Step 3: Cross multiply
    27,685.94x = 38,186.20 × 20,880.25
  4. Step 4: Simplify right side
    27,685.94x = 797,337,254.88
  5. Step 5: Solve for x
    x = 797,337,254.88/27,685.94
  6. Step 6: Final answer
    x = 28,799.35

Related Problems

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Half scale
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Double scale
Find fourth proportional to 27,686.94, 38,187.58 and 20,881.25
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.