Home / 21,191.98-29,232.02-15,231.72

Finding the Fourth Proportional to 21,191.98, 29,232.02 and 15,231.72

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Solution

The fourth proportional to 21,191.98, 29,232.02 and 15,231.72 is: 21,010.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,191.98 : 29,232.02 = 15,231.72 : x
  2. Step 2: Convert to fraction form
    21,191.98/29,232.02 = 15,231.72/x
  3. Step 3: Cross multiply
    21,191.98x = 29,232.02 × 15,231.72
  4. Step 4: Simplify right side
    21,191.98x = 445,253,943.67
  5. Step 5: Solve for x
    x = 445,253,943.67/21,191.98
  6. Step 6: Final answer
    x = 21,010.49

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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.