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Finding the Fourth Proportional to 18,511, 25,545.80 and 10,127.50

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Solution

The fourth proportional to 18,511, 25,545.80 and 10,127.50 is: 13,976.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,511 : 25,545.80 = 10,127.50 : x
  2. Step 2: Convert to fraction form
    18,511/25,545.80 = 10,127.50/x
  3. Step 3: Cross multiply
    18,511x = 25,545.80 × 10,127.50
  4. Step 4: Simplify right side
    18,511x = 258,715,089.50
  5. Step 5: Solve for x
    x = 258,715,089.50/18,511
  6. Step 6: Final answer
    x = 13,976.29

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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.