Home / 7,147.18-9,862.87-3,960.34

Finding the Fourth Proportional to 7,147.18, 9,862.87 and 3,960.34

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Solution

The fourth proportional to 7,147.18, 9,862.87 and 3,960.34 is: 5,465.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,147.18 : 9,862.87 = 3,960.34 : x
  2. Step 2: Convert to fraction form
    7,147.18/9,862.87 = 3,960.34/x
  3. Step 3: Cross multiply
    7,147.18x = 9,862.87 × 3,960.34
  4. Step 4: Simplify right side
    7,147.18x = 39,060,318.58
  5. Step 5: Solve for x
    x = 39,060,318.58/7,147.18
  6. Step 6: Final answer
    x = 5,465.14

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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.