Home / 15,565.26-21,479.31-8,491.26

Finding the Fourth Proportional to 15,565.26, 21,479.31 and 8,491.26

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Solution

The fourth proportional to 15,565.26, 21,479.31 and 8,491.26 is: 11,717.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,565.26 : 21,479.31 = 8,491.26 : x
  2. Step 2: Convert to fraction form
    15,565.26/21,479.31 = 8,491.26/x
  3. Step 3: Cross multiply
    15,565.26x = 21,479.31 × 8,491.26
  4. Step 4: Simplify right side
    15,565.26x = 182,386,405.83
  5. Step 5: Solve for x
    x = 182,386,405.83/15,565.26
  6. Step 6: Final answer
    x = 11,717.53

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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.