Home / 20,806.80-31,253.76-17,686.32

Finding the Fourth Proportional to 20,806.80, 31,253.76 and 17,686.32

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Solution

The fourth proportional to 20,806.80, 31,253.76 and 17,686.32 is: 26,566.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,806.80 : 31,253.76 = 17,686.32 : x
  2. Step 2: Convert to fraction form
    20,806.80/31,253.76 = 17,686.32/x
  3. Step 3: Cross multiply
    20,806.80x = 31,253.76 × 17,686.32
  4. Step 4: Simplify right side
    20,806.80x = 552,764,000.56
  5. Step 5: Solve for x
    x = 552,764,000.56/20,806.80
  6. Step 6: Final answer
    x = 26,566.51

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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.