Home / 12,849.12-17,724.12-8,125.20

Finding the Fourth Proportional to 12,849.12, 17,724.12 and 8,125.20

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Solution

The fourth proportional to 12,849.12, 17,724.12 and 8,125.20 is: 11,207.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,849.12 : 17,724.12 = 8,125.20 : x
  2. Step 2: Convert to fraction form
    12,849.12/17,724.12 = 8,125.20/x
  3. Step 3: Cross multiply
    12,849.12x = 17,724.12 × 8,125.20
  4. Step 4: Simplify right side
    12,849.12x = 144,012,019.82
  5. Step 5: Solve for x
    x = 144,012,019.82/12,849.12
  6. Step 6: Final answer
    x = 11,207.93

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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.