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Finding the Fourth Proportional to 8,659.40, 12,968.48 and 5,529.71

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Solution

The fourth proportional to 8,659.40, 12,968.48 and 5,529.71 is: 8,281.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,659.40 : 12,968.48 = 5,529.71 : x
  2. Step 2: Convert to fraction form
    8,659.40/12,968.48 = 5,529.71/x
  3. Step 3: Cross multiply
    8,659.40x = 12,968.48 × 5,529.71
  4. Step 4: Simplify right side
    8,659.40x = 71,711,885.03
  5. Step 5: Solve for x
    x = 71,711,885.03/8,659.40
  6. Step 6: Final answer
    x = 8,281.40

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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.