Home / 28,079.12-38,764.76-19,139.76

Finding the Fourth Proportional to 28,079.12, 38,764.76 and 19,139.76

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Solution

The fourth proportional to 28,079.12, 38,764.76 and 19,139.76 is: 26,423.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,079.12 : 38,764.76 = 19,139.76 : x
  2. Step 2: Convert to fraction form
    28,079.12/38,764.76 = 19,139.76/x
  3. Step 3: Cross multiply
    28,079.12x = 38,764.76 × 19,139.76
  4. Step 4: Simplify right side
    28,079.12x = 741,948,107.16
  5. Step 5: Solve for x
    x = 741,948,107.16/28,079.12
  6. Step 6: Final answer
    x = 26,423.48

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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.