Home / 8,240.12-12,349.23-7,139.36

Finding the Fourth Proportional to 8,240.12, 12,349.23 and 7,139.36

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Solution

The fourth proportional to 8,240.12, 12,349.23 and 7,139.36 is: 10,699.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,240.12 : 12,349.23 = 7,139.36 : x
  2. Step 2: Convert to fraction form
    8,240.12/12,349.23 = 7,139.36/x
  3. Step 3: Cross multiply
    8,240.12x = 12,349.23 × 7,139.36
  4. Step 4: Simplify right side
    8,240.12x = 88,165,598.69
  5. Step 5: Solve for x
    x = 88,165,598.69/8,240.12
  6. Step 6: Final answer
    x = 10,699.55

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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.