Home / 15,565.23-21,479.85-8,491.50

Finding the Fourth Proportional to 15,565.23, 21,479.85 and 8,491.50

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Solution

The fourth proportional to 15,565.23, 21,479.85 and 8,491.50 is: 11,718.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,565.23 : 21,479.85 = 8,491.50 : x
  2. Step 2: Convert to fraction form
    15,565.23/21,479.85 = 8,491.50/x
  3. Step 3: Cross multiply
    15,565.23x = 21,479.85 × 8,491.50
  4. Step 4: Simplify right side
    15,565.23x = 182,396,146.28
  5. Step 5: Solve for x
    x = 182,396,146.28/15,565.23
  6. Step 6: Final answer
    x = 11,718.18

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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.