Home / 15,186.19-20,959.25-9,216.71

Finding the Fourth Proportional to 15,186.19, 20,959.25 and 9,216.71

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Solution

The fourth proportional to 15,186.19, 20,959.25 and 9,216.71 is: 12,720.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,186.19 : 20,959.25 = 9,216.71 : x
  2. Step 2: Convert to fraction form
    15,186.19/20,959.25 = 9,216.71/x
  3. Step 3: Cross multiply
    15,186.19x = 20,959.25 × 9,216.71
  4. Step 4: Simplify right side
    15,186.19x = 193,175,224.27
  5. Step 5: Solve for x
    x = 193,175,224.27/15,186.19
  6. Step 6: Final answer
    x = 12,720.45

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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.