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Finding the Fourth Proportional to 15,647.80, 21,593.10 and 8,572.82

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Solution

The fourth proportional to 15,647.80, 21,593.10 and 8,572.82 is: 11,830.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,647.80 : 21,593.10 = 8,572.82 : x
  2. Step 2: Convert to fraction form
    15,647.80/21,593.10 = 8,572.82/x
  3. Step 3: Cross multiply
    15,647.80x = 21,593.10 × 8,572.82
  4. Step 4: Simplify right side
    15,647.80x = 185,113,759.54
  5. Step 5: Solve for x
    x = 185,113,759.54/15,647.80
  6. Step 6: Final answer
    x = 11,830.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.