Home / 20,920.28-31,195.87-18,017.24

Finding the Fourth Proportional to 20,920.28, 31,195.87 and 18,017.24

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Solution

The fourth proportional to 20,920.28, 31,195.87 and 18,017.24 is: 26,866.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,920.28 : 31,195.87 = 18,017.24 : x
  2. Step 2: Convert to fraction form
    20,920.28/31,195.87 = 18,017.24/x
  3. Step 3: Cross multiply
    20,920.28x = 31,195.87 × 18,017.24
  4. Step 4: Simplify right side
    20,920.28x = 562,063,476.80
  5. Step 5: Solve for x
    x = 562,063,476.80/20,920.28
  6. Step 6: Final answer
    x = 26,866.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.