Home / 21,076.12-29,085.24-11,515.74

Finding the Fourth Proportional to 21,076.12, 29,085.24 and 11,515.74

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Solution

The fourth proportional to 21,076.12, 29,085.24 and 11,515.74 is: 15,891.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,076.12 : 29,085.24 = 11,515.74 : x
  2. Step 2: Convert to fraction form
    21,076.12/29,085.24 = 11,515.74/x
  3. Step 3: Cross multiply
    21,076.12x = 29,085.24 × 11,515.74
  4. Step 4: Simplify right side
    21,076.12x = 334,938,061.68
  5. Step 5: Solve for x
    x = 334,938,061.68/21,076.12
  6. Step 6: Final answer
    x = 15,891.83

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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.