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Finding the Fourth Proportional to 10,404.09, 15,604.10 and 8,660.30

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Solution

The fourth proportional to 10,404.09, 15,604.10 and 8,660.30 is: 12,988.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,404.09 : 15,604.10 = 8,660.30 : x
  2. Step 2: Convert to fraction form
    10,404.09/15,604.10 = 8,660.30/x
  3. Step 3: Cross multiply
    10,404.09x = 15,604.10 × 8,660.30
  4. Step 4: Simplify right side
    10,404.09x = 135,136,187.23
  5. Step 5: Solve for x
    x = 135,136,187.23/10,404.09
  6. Step 6: Final answer
    x = 12,988.76

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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.