Home / 15,764.28-21,739.12-13,380.76

Finding the Fourth Proportional to 15,764.28, 21,739.12 and 13,380.76

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Solution

The fourth proportional to 15,764.28, 21,739.12 and 13,380.76 is: 18,452.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,764.28 : 21,739.12 = 13,380.76 : x
  2. Step 2: Convert to fraction form
    15,764.28/21,739.12 = 13,380.76/x
  3. Step 3: Cross multiply
    15,764.28x = 21,739.12 × 13,380.76
  4. Step 4: Simplify right side
    15,764.28x = 290,885,947.33
  5. Step 5: Solve for x
    x = 290,885,947.33/15,764.28
  6. Step 6: Final answer
    x = 18,452.22

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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.