Home / 15,112.29-20,853.79-8,397.79

Finding the Fourth Proportional to 15,112.29, 20,853.79 and 8,397.79

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Solution

The fourth proportional to 15,112.29, 20,853.79 and 8,397.79 is: 11,588.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,112.29 : 20,853.79 = 8,397.79 : x
  2. Step 2: Convert to fraction form
    15,112.29/20,853.79 = 8,397.79/x
  3. Step 3: Cross multiply
    15,112.29x = 20,853.79 × 8,397.79
  4. Step 4: Simplify right side
    15,112.29x = 175,125,749.12
  5. Step 5: Solve for x
    x = 175,125,749.12/15,112.29
  6. Step 6: Final answer
    x = 11,588.30

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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.