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Finding the Fourth Proportional to 8,988.39, 12,404.34 and 5,009.47

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Solution

The fourth proportional to 8,988.39, 12,404.34 and 5,009.47 is: 6,913.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,988.39 : 12,404.34 = 5,009.47 : x
  2. Step 2: Convert to fraction form
    8,988.39/12,404.34 = 5,009.47/x
  3. Step 3: Cross multiply
    8,988.39x = 12,404.34 × 5,009.47
  4. Step 4: Simplify right side
    8,988.39x = 62,139,169.10
  5. Step 5: Solve for x
    x = 62,139,169.10/8,988.39
  6. Step 6: Final answer
    x = 6,913.27

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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.