Home / 27,988.72-38,661.26-20,902.84

Finding the Fourth Proportional to 27,988.72, 38,661.26 and 20,902.84

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Solution

The fourth proportional to 27,988.72, 38,661.26 and 20,902.84 is: 28,873.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,988.72 : 38,661.26 = 20,902.84 : x
  2. Step 2: Convert to fraction form
    27,988.72/38,661.26 = 20,902.84/x
  3. Step 3: Cross multiply
    27,988.72x = 38,661.26 × 20,902.84
  4. Step 4: Simplify right side
    27,988.72x = 808,130,131.98
  5. Step 5: Solve for x
    x = 808,130,131.98/27,988.72
  6. Step 6: Final answer
    x = 28,873.42

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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.