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Finding the Fourth Proportional to 15,663.69, 21,616.11 and 8,589.65

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Solution

The fourth proportional to 15,663.69, 21,616.11 and 8,589.65 is: 11,853.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,663.69 : 21,616.11 = 8,589.65 : x
  2. Step 2: Convert to fraction form
    15,663.69/21,616.11 = 8,589.65/x
  3. Step 3: Cross multiply
    15,663.69x = 21,616.11 × 8,589.65
  4. Step 4: Simplify right side
    15,663.69x = 185,674,711.18
  5. Step 5: Solve for x
    x = 185,674,711.18/15,663.69
  6. Step 6: Final answer
    x = 11,853.83

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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.