Home / 39,663.28-59,478-20,931.52

Finding the Fourth Proportional to 39,663.28, 59,478 and 20,931.52

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Solution

The fourth proportional to 39,663.28, 59,478 and 20,931.52 is: 31,388.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,663.28 : 59,478 = 20,931.52 : x
  2. Step 2: Convert to fraction form
    39,663.28/59,478 = 20,931.52/x
  3. Step 3: Cross multiply
    39,663.28x = 59,478 × 20,931.52
  4. Step 4: Simplify right side
    39,663.28x = 1,244,964,946.56
  5. Step 5: Solve for x
    x = 1,244,964,946.56/39,663.28
  6. Step 6: Final answer
    x = 31,388.35

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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.