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Finding the Fourth Proportional to 11,250.67, 15,520 and 9,128.58

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Solution

The fourth proportional to 11,250.67, 15,520 and 9,128.58 is: 12,592.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,250.67 : 15,520 = 9,128.58 : x
  2. Step 2: Convert to fraction form
    11,250.67/15,520 = 9,128.58/x
  3. Step 3: Cross multiply
    11,250.67x = 15,520 × 9,128.58
  4. Step 4: Simplify right side
    11,250.67x = 141,675,561.60
  5. Step 5: Solve for x
    x = 141,675,561.60/11,250.67
  6. Step 6: Final answer
    x = 12,592.63

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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.