Home / 20,912.46-31,366.26-7,765.08

Finding the Fourth Proportional to 20,912.46, 31,366.26 and 7,765.08

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Solution

The fourth proportional to 20,912.46, 31,366.26 and 7,765.08 is: 11,646.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,912.46 : 31,366.26 = 7,765.08 : x
  2. Step 2: Convert to fraction form
    20,912.46/31,366.26 = 7,765.08/x
  3. Step 3: Cross multiply
    20,912.46x = 31,366.26 × 7,765.08
  4. Step 4: Simplify right side
    20,912.46x = 243,561,518.20
  5. Step 5: Solve for x
    x = 243,561,518.20/20,912.46
  6. Step 6: Final answer
    x = 11,646.72

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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.