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Finding the Fourth Proportional to 28,491.78, 42,738.21 and 9,793.29

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Solution

The fourth proportional to 28,491.78, 42,738.21 and 9,793.29 is: 14,690.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,491.78 : 42,738.21 = 9,793.29 : x
  2. Step 2: Convert to fraction form
    28,491.78/42,738.21 = 9,793.29/x
  3. Step 3: Cross multiply
    28,491.78x = 42,738.21 × 9,793.29
  4. Step 4: Simplify right side
    28,491.78x = 418,547,684.61
  5. Step 5: Solve for x
    x = 418,547,684.61/28,491.78
  6. Step 6: Final answer
    x = 14,690.12

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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.