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Finding the Fourth Proportional to 15,843.80, 21,869.91 and 9,132.10

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Solution

The fourth proportional to 15,843.80, 21,869.91 and 9,132.10 is: 12,605.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,843.80 : 21,869.91 = 9,132.10 : x
  2. Step 2: Convert to fraction form
    15,843.80/21,869.91 = 9,132.10/x
  3. Step 3: Cross multiply
    15,843.80x = 21,869.91 × 9,132.10
  4. Step 4: Simplify right side
    15,843.80x = 199,718,205.11
  5. Step 5: Solve for x
    x = 199,718,205.11/15,843.80
  6. Step 6: Final answer
    x = 12,605.45

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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.