Home / 21,041.78-31,499.55-20,294.15

Finding the Fourth Proportional to 21,041.78, 31,499.55 and 20,294.15

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Solution

The fourth proportional to 21,041.78, 31,499.55 and 20,294.15 is: 30,380.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,041.78 : 31,499.55 = 20,294.15 : x
  2. Step 2: Convert to fraction form
    21,041.78/31,499.55 = 20,294.15/x
  3. Step 3: Cross multiply
    21,041.78x = 31,499.55 × 20,294.15
  4. Step 4: Simplify right side
    21,041.78x = 639,256,435.13
  5. Step 5: Solve for x
    x = 639,256,435.13/21,041.78
  6. Step 6: Final answer
    x = 30,380.35

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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.