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Finding the Fourth Proportional to 15,304.70, 21,118.91 and 8,591.01

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Solution

The fourth proportional to 15,304.70, 21,118.91 and 8,591.01 is: 11,854.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,304.70 : 21,118.91 = 8,591.01 : x
  2. Step 2: Convert to fraction form
    15,304.70/21,118.91 = 8,591.01/x
  3. Step 3: Cross multiply
    15,304.70x = 21,118.91 × 8,591.01
  4. Step 4: Simplify right side
    15,304.70x = 181,432,724.04
  5. Step 5: Solve for x
    x = 181,432,724.04/15,304.70
  6. Step 6: Final answer
    x = 11,854.71

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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.