Home / 39,411.60-54,389.16-21,507.76

Finding the Fourth Proportional to 39,411.60, 54,389.16 and 21,507.76

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Solution

The fourth proportional to 39,411.60, 54,389.16 and 21,507.76 is: 29,681.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,411.60 : 54,389.16 = 21,507.76 : x
  2. Step 2: Convert to fraction form
    39,411.60/54,389.16 = 21,507.76/x
  3. Step 3: Cross multiply
    39,411.60x = 54,389.16 × 21,507.76
  4. Step 4: Simplify right side
    39,411.60x = 1,169,789,148.52
  5. Step 5: Solve for x
    x = 1,169,789,148.52/39,411.60
  6. Step 6: Final answer
    x = 29,681.34

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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.