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Finding the Fourth Proportional to 8,869.56, 12,239.88 and 5,143.56

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Solution

The fourth proportional to 8,869.56, 12,239.88 and 5,143.56 is: 7,098.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,869.56 : 12,239.88 = 5,143.56 : x
  2. Step 2: Convert to fraction form
    8,869.56/12,239.88 = 5,143.56/x
  3. Step 3: Cross multiply
    8,869.56x = 12,239.88 × 5,143.56
  4. Step 4: Simplify right side
    8,869.56x = 62,956,557.17
  5. Step 5: Solve for x
    x = 62,956,557.17/8,869.56
  6. Step 6: Final answer
    x = 7,098.05

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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.