Home / 20,873.28-31,309.52-5,290.50

Finding the Fourth Proportional to 20,873.28, 31,309.52 and 5,290.50

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Solution

The fourth proportional to 20,873.28, 31,309.52 and 5,290.50 is: 7,935.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,873.28 : 31,309.52 = 5,290.50 : x
  2. Step 2: Convert to fraction form
    20,873.28/31,309.52 = 5,290.50/x
  3. Step 3: Cross multiply
    20,873.28x = 31,309.52 × 5,290.50
  4. Step 4: Simplify right side
    20,873.28x = 165,642,989.11
  5. Step 5: Solve for x
    x = 165,642,989.11/20,873.28
  6. Step 6: Final answer
    x = 7,935.65

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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.