Home / 28,305.20-42,417.56-20,851.04

Finding the Fourth Proportional to 28,305.20, 42,417.56 and 20,851.04

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Solution

The fourth proportional to 28,305.20, 42,417.56 and 20,851.04 is: 31,246.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,305.20 : 42,417.56 = 20,851.04 : x
  2. Step 2: Convert to fraction form
    28,305.20/42,417.56 = 20,851.04/x
  3. Step 3: Cross multiply
    28,305.20x = 42,417.56 × 20,851.04
  4. Step 4: Simplify right side
    28,305.20x = 884,450,240.26
  5. Step 5: Solve for x
    x = 884,450,240.26/28,305.20
  6. Step 6: Final answer
    x = 31,246.92

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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.