Home / 7,339.10-10,127.84-3,981.78

Finding the Fourth Proportional to 7,339.10, 10,127.84 and 3,981.78

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Solution

The fourth proportional to 7,339.10, 10,127.84 and 3,981.78 is: 5,494.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,339.10 : 10,127.84 = 3,981.78 : x
  2. Step 2: Convert to fraction form
    7,339.10/10,127.84 = 3,981.78/x
  3. Step 3: Cross multiply
    7,339.10x = 10,127.84 × 3,981.78
  4. Step 4: Simplify right side
    7,339.10x = 40,326,810.85
  5. Step 5: Solve for x
    x = 40,326,810.85/7,339.10
  6. Step 6: Final answer
    x = 5,494.79

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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.