Home / 13,979.35-20,982.17-7,320.63

Finding the Fourth Proportional to 13,979.35, 20,982.17 and 7,320.63

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Solution

The fourth proportional to 13,979.35, 20,982.17 and 7,320.63 is: 10,987.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,979.35 : 20,982.17 = 7,320.63 : x
  2. Step 2: Convert to fraction form
    13,979.35/20,982.17 = 7,320.63/x
  3. Step 3: Cross multiply
    13,979.35x = 20,982.17 × 7,320.63
  4. Step 4: Simplify right side
    13,979.35x = 153,602,709.91
  5. Step 5: Solve for x
    x = 153,602,709.91/13,979.35
  6. Step 6: Final answer
    x = 10,987.83

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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.