Home / 8,139.40-12,209.16-5,330.60

Finding the Fourth Proportional to 8,139.40, 12,209.16 and 5,330.60

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Solution

The fourth proportional to 8,139.40, 12,209.16 and 5,330.60 is: 7,995.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,139.40 : 12,209.16 = 5,330.60 : x
  2. Step 2: Convert to fraction form
    8,139.40/12,209.16 = 5,330.60/x
  3. Step 3: Cross multiply
    8,139.40x = 12,209.16 × 5,330.60
  4. Step 4: Simplify right side
    8,139.40x = 65,082,148.30
  5. Step 5: Solve for x
    x = 65,082,148.30/8,139.40
  6. Step 6: Final answer
    x = 7,995.94

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1.5x scale

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.