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Finding the Fourth Proportional to 8,988.60, 12,404.88 and 5,009.88

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Solution

The fourth proportional to 8,988.60, 12,404.88 and 5,009.88 is: 6,913.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,988.60 : 12,404.88 = 5,009.88 : x
  2. Step 2: Convert to fraction form
    8,988.60/12,404.88 = 5,009.88/x
  3. Step 3: Cross multiply
    8,988.60x = 12,404.88 × 5,009.88
  4. Step 4: Simplify right side
    8,988.60x = 62,146,960.21
  5. Step 5: Solve for x
    x = 62,146,960.21/8,988.60
  6. Step 6: Final answer
    x = 6,913.98

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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.