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Finding the Fourth Proportional to 22,378.74, 30,829.32 and 15,651.78

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Solution

The fourth proportional to 22,378.74, 30,829.32 and 15,651.78 is: 21,562.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,378.74 : 30,829.32 = 15,651.78 : x
  2. Step 2: Convert to fraction form
    22,378.74/30,829.32 = 15,651.78/x
  3. Step 3: Cross multiply
    22,378.74x = 30,829.32 × 15,651.78
  4. Step 4: Simplify right side
    22,378.74x = 482,533,734.19
  5. Step 5: Solve for x
    x = 482,533,734.19/22,378.74
  6. Step 6: Final answer
    x = 21,562.15

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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.