Home / 20,687.28-31,028.32-6,646.20

Finding the Fourth Proportional to 20,687.28, 31,028.32 and 6,646.20

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Solution

The fourth proportional to 20,687.28, 31,028.32 and 6,646.20 is: 9,968.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,687.28 : 31,028.32 = 6,646.20 : x
  2. Step 2: Convert to fraction form
    20,687.28/31,028.32 = 6,646.20/x
  3. Step 3: Cross multiply
    20,687.28x = 31,028.32 × 6,646.20
  4. Step 4: Simplify right side
    20,687.28x = 206,220,420.38
  5. Step 5: Solve for x
    x = 206,220,420.38/20,687.28
  6. Step 6: Final answer
    x = 9,968.46

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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.