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Finding the Fourth Proportional to 20,240.80, 30,361.20 and 15,569.80

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Solution

The fourth proportional to 20,240.80, 30,361.20 and 15,569.80 is: 23,354.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,240.80 : 30,361.20 = 15,569.80 : x
  2. Step 2: Convert to fraction form
    20,240.80/30,361.20 = 15,569.80/x
  3. Step 3: Cross multiply
    20,240.80x = 30,361.20 × 15,569.80
  4. Step 4: Simplify right side
    20,240.80x = 472,717,811.76
  5. Step 5: Solve for x
    x = 472,717,811.76/20,240.80
  6. Step 6: Final answer
    x = 23,354.70

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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.