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Finding the Fourth Proportional to 8,666.89, 13,003.59 and 5,158.91

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Solution

The fourth proportional to 8,666.89, 13,003.59 and 5,158.91 is: 7,740.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,666.89 : 13,003.59 = 5,158.91 : x
  2. Step 2: Convert to fraction form
    8,666.89/13,003.59 = 5,158.91/x
  3. Step 3: Cross multiply
    8,666.89x = 13,003.59 × 5,158.91
  4. Step 4: Simplify right side
    8,666.89x = 67,084,350.49
  5. Step 5: Solve for x
    x = 67,084,350.49/8,666.89
  6. Step 6: Final answer
    x = 7,740.30

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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.