Home / 28,107.30-38,761.70-18,038.90

Finding the Fourth Proportional to 28,107.30, 38,761.70 and 18,038.90

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Solution

The fourth proportional to 28,107.30, 38,761.70 and 18,038.90 is: 24,876.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,107.30 : 38,761.70 = 18,038.90 : x
  2. Step 2: Convert to fraction form
    28,107.30/38,761.70 = 18,038.90/x
  3. Step 3: Cross multiply
    28,107.30x = 38,761.70 × 18,038.90
  4. Step 4: Simplify right side
    28,107.30x = 699,218,430.13
  5. Step 5: Solve for x
    x = 699,218,430.13/28,107.30
  6. Step 6: Final answer
    x = 24,876.76

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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.