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Finding the Fourth Proportional to 28,411.20, 42,605.28 and 9,933.12

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Solution

The fourth proportional to 28,411.20, 42,605.28 and 9,933.12 is: 14,895.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,411.20 : 42,605.28 = 9,933.12 : x
  2. Step 2: Convert to fraction form
    28,411.20/42,605.28 = 9,933.12/x
  3. Step 3: Cross multiply
    28,411.20x = 42,605.28 × 9,933.12
  4. Step 4: Simplify right side
    28,411.20x = 423,203,358.87
  5. Step 5: Solve for x
    x = 423,203,358.87/28,411.20
  6. Step 6: Final answer
    x = 14,895.65

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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.