Home / 15,387.62-21,272.61-15,247.22

Finding the Fourth Proportional to 15,387.62, 21,272.61 and 15,247.22

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Solution

The fourth proportional to 15,387.62, 21,272.61 and 15,247.22 is: 21,078.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,387.62 : 21,272.61 = 15,247.22 : x
  2. Step 2: Convert to fraction form
    15,387.62/21,272.61 = 15,247.22/x
  3. Step 3: Cross multiply
    15,387.62x = 21,272.61 × 15,247.22
  4. Step 4: Simplify right side
    15,387.62x = 324,348,164.64
  5. Step 5: Solve for x
    x = 324,348,164.64/15,387.62
  6. Step 6: Final answer
    x = 21,078.51

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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.