Home / 7,146.20-9,861.74-4,121.31

Finding the Fourth Proportional to 7,146.20, 9,861.74 and 4,121.31

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Solution

The fourth proportional to 7,146.20, 9,861.74 and 4,121.31 is: 5,687.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,146.20 : 9,861.74 = 4,121.31 : x
  2. Step 2: Convert to fraction form
    7,146.20/9,861.74 = 4,121.31/x
  3. Step 3: Cross multiply
    7,146.20x = 9,861.74 × 4,121.31
  4. Step 4: Simplify right side
    7,146.20x = 40,643,267.07
  5. Step 5: Solve for x
    x = 40,643,267.07/7,146.20
  6. Step 6: Final answer
    x = 5,687.40

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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.