Home / 15,565.07-21,479.87-8,491.65

Finding the Fourth Proportional to 15,565.07, 21,479.87 and 8,491.65

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Solution

The fourth proportional to 15,565.07, 21,479.87 and 8,491.65 is: 11,718.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,565.07 : 21,479.87 = 8,491.65 : x
  2. Step 2: Convert to fraction form
    15,565.07/21,479.87 = 8,491.65/x
  3. Step 3: Cross multiply
    15,565.07x = 21,479.87 × 8,491.65
  4. Step 4: Simplify right side
    15,565.07x = 182,399,478.77
  5. Step 5: Solve for x
    x = 182,399,478.77/15,565.07
  6. Step 6: Final answer
    x = 11,718.51

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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.