Home / 20,391.30-28,142.46-11,437.11

Finding the Fourth Proportional to 20,391.30, 28,142.46 and 11,437.11

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Solution

The fourth proportional to 20,391.30, 28,142.46 and 11,437.11 is: 15,784.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,391.30 : 28,142.46 = 11,437.11 : x
  2. Step 2: Convert to fraction form
    20,391.30/28,142.46 = 11,437.11/x
  3. Step 3: Cross multiply
    20,391.30x = 28,142.46 × 11,437.11
  4. Step 4: Simplify right side
    20,391.30x = 321,868,410.69
  5. Step 5: Solve for x
    x = 321,868,410.69/20,391.30
  6. Step 6: Final answer
    x = 15,784.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.