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Finding the Fourth Proportional to 8,957.64, 13,421.88 and 7,098.72

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Solution

The fourth proportional to 8,957.64, 13,421.88 and 7,098.72 is: 10,636.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,957.64 : 13,421.88 = 7,098.72 : x
  2. Step 2: Convert to fraction form
    8,957.64/13,421.88 = 7,098.72/x
  3. Step 3: Cross multiply
    8,957.64x = 13,421.88 × 7,098.72
  4. Step 4: Simplify right side
    8,957.64x = 95,278,167.99
  5. Step 5: Solve for x
    x = 95,278,167.99/8,957.64
  6. Step 6: Final answer
    x = 10,636.53

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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.