Home / 20,860.30-31,104.38-18,542.08

Finding the Fourth Proportional to 20,860.30, 31,104.38 and 18,542.08

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Solution

The fourth proportional to 20,860.30, 31,104.38 and 18,542.08 is: 27,647.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,860.30 : 31,104.38 = 18,542.08 : x
  2. Step 2: Convert to fraction form
    20,860.30/31,104.38 = 18,542.08/x
  3. Step 3: Cross multiply
    20,860.30x = 31,104.38 × 18,542.08
  4. Step 4: Simplify right side
    20,860.30x = 576,739,731.84
  5. Step 5: Solve for x
    x = 576,739,731.84/20,860.30
  6. Step 6: Final answer
    x = 27,647.72

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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.