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Finding the Fourth Proportional to 18,702.50, 25,805.39 and 11,151.68

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Solution

The fourth proportional to 18,702.50, 25,805.39 and 11,151.68 is: 15,386.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,702.50 : 25,805.39 = 11,151.68 : x
  2. Step 2: Convert to fraction form
    18,702.50/25,805.39 = 11,151.68/x
  3. Step 3: Cross multiply
    18,702.50x = 25,805.39 × 11,151.68
  4. Step 4: Simplify right side
    18,702.50x = 287,773,266.77
  5. Step 5: Solve for x
    x = 287,773,266.77/18,702.50
  6. Step 6: Final answer
    x = 15,386.89

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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.