Home / 20,779.29-31,309.19-17,162.54

Finding the Fourth Proportional to 20,779.29, 31,309.19 and 17,162.54

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Solution

The fourth proportional to 20,779.29, 31,309.19 and 17,162.54 is: 25,859.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,779.29 : 31,309.19 = 17,162.54 : x
  2. Step 2: Convert to fraction form
    20,779.29/31,309.19 = 17,162.54/x
  3. Step 3: Cross multiply
    20,779.29x = 31,309.19 × 17,162.54
  4. Step 4: Simplify right side
    20,779.29x = 537,345,225.74
  5. Step 5: Solve for x
    x = 537,345,225.74/20,779.29
  6. Step 6: Final answer
    x = 25,859.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.