Home / 13,920.12-20,881.47-4,560.21

Finding the Fourth Proportional to 13,920.12, 20,881.47 and 4,560.21

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Solution

The fourth proportional to 13,920.12, 20,881.47 and 4,560.21 is: 6,840.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,920.12 : 20,881.47 = 4,560.21 : x
  2. Step 2: Convert to fraction form
    13,920.12/20,881.47 = 4,560.21/x
  3. Step 3: Cross multiply
    13,920.12x = 20,881.47 × 4,560.21
  4. Step 4: Simplify right side
    13,920.12x = 95,223,888.31
  5. Step 5: Solve for x
    x = 95,223,888.31/13,920.12
  6. Step 6: Final answer
    x = 6,840.74

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.