Home / 15,565.08-21,479.40-8,491.62

Finding the Fourth Proportional to 15,565.08, 21,479.40 and 8,491.62

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Solution

The fourth proportional to 15,565.08, 21,479.40 and 8,491.62 is: 11,718.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,565.08 : 21,479.40 = 8,491.62 : x
  2. Step 2: Convert to fraction form
    15,565.08/21,479.40 = 8,491.62/x
  3. Step 3: Cross multiply
    15,565.08x = 21,479.40 × 8,491.62
  4. Step 4: Simplify right side
    15,565.08x = 182,394,902.63
  5. Step 5: Solve for x
    x = 182,394,902.63/15,565.08
  6. Step 6: Final answer
    x = 11,718.21

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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.