Home / 20,778.29-31,307.69-17,161.54

Finding the Fourth Proportional to 20,778.29, 31,307.69 and 17,161.54

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Solution

The fourth proportional to 20,778.29, 31,307.69 and 17,161.54 is: 25,858.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,778.29 : 31,307.69 = 17,161.54 : x
  2. Step 2: Convert to fraction form
    20,778.29/31,307.69 = 17,161.54/x
  3. Step 3: Cross multiply
    20,778.29x = 31,307.69 × 17,161.54
  4. Step 4: Simplify right side
    20,778.29x = 537,288,010.17
  5. Step 5: Solve for x
    x = 537,288,010.17/20,778.29
  6. Step 6: Final answer
    x = 25,858.15

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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.