Home / 20,940.30-31,410.72-5,357.52

Finding the Fourth Proportional to 20,940.30, 31,410.72 and 5,357.52

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Solution

The fourth proportional to 20,940.30, 31,410.72 and 5,357.52 is: 8,036.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,940.30 : 31,410.72 = 5,357.52 : x
  2. Step 2: Convert to fraction form
    20,940.30/31,410.72 = 5,357.52/x
  3. Step 3: Cross multiply
    20,940.30x = 31,410.72 × 5,357.52
  4. Step 4: Simplify right side
    20,940.30x = 168,283,560.61
  5. Step 5: Solve for x
    x = 168,283,560.61/20,940.30
  6. Step 6: Final answer
    x = 8,036.35

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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.