Home / 39,411.04-54,388.39-21,507.20

Finding the Fourth Proportional to 39,411.04, 54,388.39 and 21,507.20

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Solution

The fourth proportional to 39,411.04, 54,388.39 and 21,507.20 is: 29,680.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,411.04 : 54,388.39 = 21,507.20 : x
  2. Step 2: Convert to fraction form
    39,411.04/54,388.39 = 21,507.20/x
  3. Step 3: Cross multiply
    39,411.04x = 54,388.39 × 21,507.20
  4. Step 4: Simplify right side
    39,411.04x = 1,169,741,717.35
  5. Step 5: Solve for x
    x = 1,169,741,717.35/39,411.04
  6. Step 6: Final answer
    x = 29,680.56

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Double scale
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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.