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Finding the Fourth Proportional to 8,655.74, 12,988.20 and 5,537.48

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Solution

The fourth proportional to 8,655.74, 12,988.20 and 5,537.48 is: 8,309.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,655.74 : 12,988.20 = 5,537.48 : x
  2. Step 2: Convert to fraction form
    8,655.74/12,988.20 = 5,537.48/x
  3. Step 3: Cross multiply
    8,655.74x = 12,988.20 × 5,537.48
  4. Step 4: Simplify right side
    8,655.74x = 71,921,897.74
  5. Step 5: Solve for x
    x = 71,921,897.74/8,655.74
  6. Step 6: Final answer
    x = 8,309.16

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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.