Home / 20,712.90-31,069.35-18,744.60

Finding the Fourth Proportional to 20,712.90, 31,069.35 and 18,744.60

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Solution

The fourth proportional to 20,712.90, 31,069.35 and 18,744.60 is: 28,116.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,712.90 : 31,069.35 = 18,744.60 : x
  2. Step 2: Convert to fraction form
    20,712.90/31,069.35 = 18,744.60/x
  3. Step 3: Cross multiply
    20,712.90x = 31,069.35 × 18,744.60
  4. Step 4: Simplify right side
    20,712.90x = 582,382,538.01
  5. Step 5: Solve for x
    x = 582,382,538.01/20,712.90
  6. Step 6: Final answer
    x = 28,116.90

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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.