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Finding the Fourth Proportional to 28,417.68, 42,631.32 and 8,694.12

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Solution

The fourth proportional to 28,417.68, 42,631.32 and 8,694.12 is: 13,042.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,417.68 : 42,631.32 = 8,694.12 : x
  2. Step 2: Convert to fraction form
    28,417.68/42,631.32 = 8,694.12/x
  3. Step 3: Cross multiply
    28,417.68x = 42,631.32 × 8,694.12
  4. Step 4: Simplify right side
    28,417.68x = 370,641,811.84
  5. Step 5: Solve for x
    x = 370,641,811.84/28,417.68
  6. Step 6: Final answer
    x = 13,042.65

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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.