Home / 20,969.28-31,449.60-9,275.04

Finding the Fourth Proportional to 20,969.28, 31,449.60 and 9,275.04

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Solution

The fourth proportional to 20,969.28, 31,449.60 and 9,275.04 is: 13,910.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,969.28 : 31,449.60 = 9,275.04 : x
  2. Step 2: Convert to fraction form
    20,969.28/31,449.60 = 9,275.04/x
  3. Step 3: Cross multiply
    20,969.28x = 31,449.60 × 9,275.04
  4. Step 4: Simplify right side
    20,969.28x = 291,696,297.98
  5. Step 5: Solve for x
    x = 291,696,297.98/20,969.28
  6. Step 6: Final answer
    x = 13,910.65

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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.