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Finding the Fourth Proportional to 8,960.72, 13,421.64 and 4,334

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Solution

The fourth proportional to 8,960.72, 13,421.64 and 4,334 is: 6,491.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,960.72 : 13,421.64 = 4,334 : x
  2. Step 2: Convert to fraction form
    8,960.72/13,421.64 = 4,334/x
  3. Step 3: Cross multiply
    8,960.72x = 13,421.64 × 4,334
  4. Step 4: Simplify right side
    8,960.72x = 58,169,387.76
  5. Step 5: Solve for x
    x = 58,169,387.76/8,960.72
  6. Step 6: Final answer
    x = 6,491.60

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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.