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Finding the Fourth Proportional to 8,892.20, 13,257.64 and 8,661.38

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Solution

The fourth proportional to 8,892.20, 13,257.64 and 8,661.38 is: 12,913.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,892.20 : 13,257.64 = 8,661.38 : x
  2. Step 2: Convert to fraction form
    8,892.20/13,257.64 = 8,661.38/x
  3. Step 3: Cross multiply
    8,892.20x = 13,257.64 × 8,661.38
  4. Step 4: Simplify right side
    8,892.20x = 114,829,457.94
  5. Step 5: Solve for x
    x = 114,829,457.94/8,892.20
  6. Step 6: Final answer
    x = 12,913.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.