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Finding the Fourth Proportional to 28,363.57, 42,534.11 and 9,639.81

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Solution

The fourth proportional to 28,363.57, 42,534.11 and 9,639.81 is: 14,455.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,363.57 : 42,534.11 = 9,639.81 : x
  2. Step 2: Convert to fraction form
    28,363.57/42,534.11 = 9,639.81/x
  3. Step 3: Cross multiply
    28,363.57x = 42,534.11 × 9,639.81
  4. Step 4: Simplify right side
    28,363.57x = 410,020,763.02
  5. Step 5: Solve for x
    x = 410,020,763.02/28,363.57
  6. Step 6: Final answer
    x = 14,455.90

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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.