Home / 20,780.23-31,170.28-5,989.23

Finding the Fourth Proportional to 20,780.23, 31,170.28 and 5,989.23

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Solution

The fourth proportional to 20,780.23, 31,170.28 and 5,989.23 is: 8,983.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,780.23 : 31,170.28 = 5,989.23 : x
  2. Step 2: Convert to fraction form
    20,780.23/31,170.28 = 5,989.23/x
  3. Step 3: Cross multiply
    20,780.23x = 31,170.28 × 5,989.23
  4. Step 4: Simplify right side
    20,780.23x = 186,685,805.26
  5. Step 5: Solve for x
    x = 186,685,805.26/20,780.23
  6. Step 6: Final answer
    x = 8,983.82

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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.