Home / 12,939.12-17,856.16-7,349.04

Finding the Fourth Proportional to 12,939.12, 17,856.16 and 7,349.04

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Solution

The fourth proportional to 12,939.12, 17,856.16 and 7,349.04 is: 10,141.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,939.12 : 17,856.16 = 7,349.04 : x
  2. Step 2: Convert to fraction form
    12,939.12/17,856.16 = 7,349.04/x
  3. Step 3: Cross multiply
    12,939.12x = 17,856.16 × 7,349.04
  4. Step 4: Simplify right side
    12,939.12x = 131,225,634.09
  5. Step 5: Solve for x
    x = 131,225,634.09/12,939.12
  6. Step 6: Final answer
    x = 10,141.77

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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.