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Finding the Fourth Proportional to 8,956.90, 12,360.13 and 5,179.46

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Solution

The fourth proportional to 8,956.90, 12,360.13 and 5,179.46 is: 7,147.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,956.90 : 12,360.13 = 5,179.46 : x
  2. Step 2: Convert to fraction form
    8,956.90/12,360.13 = 5,179.46/x
  3. Step 3: Cross multiply
    8,956.90x = 12,360.13 × 5,179.46
  4. Step 4: Simplify right side
    8,956.90x = 64,018,798.93
  5. Step 5: Solve for x
    x = 64,018,798.93/8,956.90
  6. Step 6: Final answer
    x = 7,147.43

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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.