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Finding the Fourth Proportional to 8,666.60, 11,957.82 and 5,130.68

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Solution

The fourth proportional to 8,666.60, 11,957.82 and 5,130.68 is: 7,079.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,666.60 : 11,957.82 = 5,130.68 : x
  2. Step 2: Convert to fraction form
    8,666.60/11,957.82 = 5,130.68/x
  3. Step 3: Cross multiply
    8,666.60x = 11,957.82 × 5,130.68
  4. Step 4: Simplify right side
    8,666.60x = 61,351,747.92
  5. Step 5: Solve for x
    x = 61,351,747.92/8,666.60
  6. Step 6: Final answer
    x = 7,079.10

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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.