Home / 15,189.75-20,959.89-8,729.22

Finding the Fourth Proportional to 15,189.75, 20,959.89 and 8,729.22

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Solution

The fourth proportional to 15,189.75, 20,959.89 and 8,729.22 is: 12,045.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,189.75 : 20,959.89 = 8,729.22 : x
  2. Step 2: Convert to fraction form
    15,189.75/20,959.89 = 8,729.22/x
  3. Step 3: Cross multiply
    15,189.75x = 20,959.89 × 8,729.22
  4. Step 4: Simplify right side
    15,189.75x = 182,963,490.99
  5. Step 5: Solve for x
    x = 182,963,490.99/15,189.75
  6. Step 6: Final answer
    x = 12,045.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.