Home / 20,959.80-31,393.26-12,172.92

Finding the Fourth Proportional to 20,959.80, 31,393.26 and 12,172.92

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Solution

The fourth proportional to 20,959.80, 31,393.26 and 12,172.92 is: 18,232.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,959.80 : 31,393.26 = 12,172.92 : x
  2. Step 2: Convert to fraction form
    20,959.80/31,393.26 = 12,172.92/x
  3. Step 3: Cross multiply
    20,959.80x = 31,393.26 × 12,172.92
  4. Step 4: Simplify right side
    20,959.80x = 382,147,642.52
  5. Step 5: Solve for x
    x = 382,147,642.52/20,959.80
  6. Step 6: Final answer
    x = 18,232.41

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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.