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Finding the Fourth Proportional to 15,523.65, 21,422.48 and 8,809.43

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Solution

The fourth proportional to 15,523.65, 21,422.48 and 8,809.43 is: 12,156.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,523.65 : 21,422.48 = 8,809.43 : x
  2. Step 2: Convert to fraction form
    15,523.65/21,422.48 = 8,809.43/x
  3. Step 3: Cross multiply
    15,523.65x = 21,422.48 × 8,809.43
  4. Step 4: Simplify right side
    15,523.65x = 188,719,686.83
  5. Step 5: Solve for x
    x = 188,719,686.83/15,523.65
  6. Step 6: Final answer
    x = 12,156.91

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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.