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Finding the Fourth Proportional to 8,988.38, 12,402.50 and 5,009.38

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Solution

The fourth proportional to 8,988.38, 12,402.50 and 5,009.38 is: 6,912.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,988.38 : 12,402.50 = 5,009.38 : x
  2. Step 2: Convert to fraction form
    8,988.38/12,402.50 = 5,009.38/x
  3. Step 3: Cross multiply
    8,988.38x = 12,402.50 × 5,009.38
  4. Step 4: Simplify right side
    8,988.38x = 62,128,835.45
  5. Step 5: Solve for x
    x = 62,128,835.45/8,988.38
  6. Step 6: Final answer
    x = 6,912.13

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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.