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Finding the Fourth Proportional to 28,069.74, 42,105.32 and 8,348.47

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Solution

The fourth proportional to 28,069.74, 42,105.32 and 8,348.47 is: 12,522.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,069.74 : 42,105.32 = 8,348.47 : x
  2. Step 2: Convert to fraction form
    28,069.74/42,105.32 = 8,348.47/x
  3. Step 3: Cross multiply
    28,069.74x = 42,105.32 × 8,348.47
  4. Step 4: Simplify right side
    28,069.74x = 351,514,885.16
  5. Step 5: Solve for x
    x = 351,514,885.16/28,069.74
  6. Step 6: Final answer
    x = 12,522.91

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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.