Home / 39,414.40-54,392.28-21,509.20

Finding the Fourth Proportional to 39,414.40, 54,392.28 and 21,509.20

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Solution

The fourth proportional to 39,414.40, 54,392.28 and 21,509.20 is: 29,682.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,414.40 : 54,392.28 = 21,509.20 : x
  2. Step 2: Convert to fraction form
    39,414.40/54,392.28 = 21,509.20/x
  3. Step 3: Cross multiply
    39,414.40x = 54,392.28 × 21,509.20
  4. Step 4: Simplify right side
    39,414.40x = 1,169,934,428.98
  5. Step 5: Solve for x
    x = 1,169,934,428.98/39,414.40
  6. Step 6: Final answer
    x = 29,682.92

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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.