Home / 15,565.11-21,479.83-8,491.51

Finding the Fourth Proportional to 15,565.11, 21,479.83 and 8,491.51

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Solution

The fourth proportional to 15,565.11, 21,479.83 and 8,491.51 is: 11,718.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,565.11 : 21,479.83 = 8,491.51 : x
  2. Step 2: Convert to fraction form
    15,565.11/21,479.83 = 8,491.51/x
  3. Step 3: Cross multiply
    15,565.11x = 21,479.83 × 8,491.51
  4. Step 4: Simplify right side
    15,565.11x = 182,396,191.24
  5. Step 5: Solve for x
    x = 182,396,191.24/15,565.11
  6. Step 6: Final answer
    x = 11,718.27

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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.