Home / 15,590.81-21,515.79-8,517.69

Finding the Fourth Proportional to 15,590.81, 21,515.79 and 8,517.69

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Solution

The fourth proportional to 15,590.81, 21,515.79 and 8,517.69 is: 11,754.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,590.81 : 21,515.79 = 8,517.69 : x
  2. Step 2: Convert to fraction form
    15,590.81/21,515.79 = 8,517.69/x
  3. Step 3: Cross multiply
    15,590.81x = 21,515.79 × 8,517.69
  4. Step 4: Simplify right side
    15,590.81x = 183,264,679.16
  5. Step 5: Solve for x
    x = 183,264,679.16/15,590.81
  6. Step 6: Final answer
    x = 11,754.66

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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.