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Finding the Fourth Proportional to 8,637.28, 12,960.71 and 8,009.89

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Solution

The fourth proportional to 8,637.28, 12,960.71 and 8,009.89 is: 12,019.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,637.28 : 12,960.71 = 8,009.89 : x
  2. Step 2: Convert to fraction form
    8,637.28/12,960.71 = 8,009.89/x
  3. Step 3: Cross multiply
    8,637.28x = 12,960.71 × 8,009.89
  4. Step 4: Simplify right side
    8,637.28x = 103,813,819.01
  5. Step 5: Solve for x
    x = 103,813,819.01/8,637.28
  6. Step 6: Final answer
    x = 12,019.27

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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.