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Finding the Fourth Proportional to 25,863.60, 38,831.40 and 16,561.20

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Solution

The fourth proportional to 25,863.60, 38,831.40 and 16,561.20 is: 24,864.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,863.60 : 38,831.40 = 16,561.20 : x
  2. Step 2: Convert to fraction form
    25,863.60/38,831.40 = 16,561.20/x
  3. Step 3: Cross multiply
    25,863.60x = 38,831.40 × 16,561.20
  4. Step 4: Simplify right side
    25,863.60x = 643,094,581.68
  5. Step 5: Solve for x
    x = 643,094,581.68/25,863.60
  6. Step 6: Final answer
    x = 24,864.85

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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.