Home / 21,040.41-31,543.92-10,505.01

Finding the Fourth Proportional to 21,040.41, 31,543.92 and 10,505.01

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Solution

The fourth proportional to 21,040.41, 31,543.92 and 10,505.01 is: 15,749.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,040.41 : 31,543.92 = 10,505.01 : x
  2. Step 2: Convert to fraction form
    21,040.41/31,543.92 = 10,505.01/x
  3. Step 3: Cross multiply
    21,040.41x = 31,543.92 × 10,505.01
  4. Step 4: Simplify right side
    21,040.41x = 331,369,195.04
  5. Step 5: Solve for x
    x = 331,369,195.04/21,040.41
  6. Step 6: Final answer
    x = 15,749.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.