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Finding the Fourth Proportional to 8,638.37, 12,959.19 and 5,981.16

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Solution

The fourth proportional to 8,638.37, 12,959.19 and 5,981.16 is: 8,972.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,638.37 : 12,959.19 = 5,981.16 : x
  2. Step 2: Convert to fraction form
    8,638.37/12,959.19 = 5,981.16/x
  3. Step 3: Cross multiply
    8,638.37x = 12,959.19 × 5,981.16
  4. Step 4: Simplify right side
    8,638.37x = 77,510,988.86
  5. Step 5: Solve for x
    x = 77,510,988.86/8,638.37
  6. Step 6: Final answer
    x = 8,972.88

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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.