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Finding the Fourth Proportional to 15,500.50, 21,391.17 and 8,876.50

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Solution

The fourth proportional to 15,500.50, 21,391.17 and 8,876.50 is: 12,249.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,500.50 : 21,391.17 = 8,876.50 : x
  2. Step 2: Convert to fraction form
    15,500.50/21,391.17 = 8,876.50/x
  3. Step 3: Cross multiply
    15,500.50x = 21,391.17 × 8,876.50
  4. Step 4: Simplify right side
    15,500.50x = 189,878,720.51
  5. Step 5: Solve for x
    x = 189,878,720.51/15,500.50
  6. Step 6: Final answer
    x = 12,249.84

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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.