Home / 7,818.32-11,728.38-3,139.95

Finding the Fourth Proportional to 7,818.32, 11,728.38 and 3,139.95

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Solution

The fourth proportional to 7,818.32, 11,728.38 and 3,139.95 is: 4,710.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,818.32 : 11,728.38 = 3,139.95 : x
  2. Step 2: Convert to fraction form
    7,818.32/11,728.38 = 3,139.95/x
  3. Step 3: Cross multiply
    7,818.32x = 11,728.38 × 3,139.95
  4. Step 4: Simplify right side
    7,818.32x = 36,826,526.78
  5. Step 5: Solve for x
    x = 36,826,526.78/7,818.32
  6. Step 6: Final answer
    x = 4,710.29

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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.