Home / 13,387.61-18,476.16-8,086.79

Finding the Fourth Proportional to 13,387.61, 18,476.16 and 8,086.79

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Solution

The fourth proportional to 13,387.61, 18,476.16 and 8,086.79 is: 11,160.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,387.61 : 18,476.16 = 8,086.79 : x
  2. Step 2: Convert to fraction form
    13,387.61/18,476.16 = 8,086.79/x
  3. Step 3: Cross multiply
    13,387.61x = 18,476.16 × 8,086.79
  4. Step 4: Simplify right side
    13,387.61x = 149,412,825.93
  5. Step 5: Solve for x
    x = 149,412,825.93/13,387.61
  6. Step 6: Final answer
    x = 11,160.53

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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.