Home / 15,418.28-21,272.26-9,443.72

Finding the Fourth Proportional to 15,418.28, 21,272.26 and 9,443.72

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Solution

The fourth proportional to 15,418.28, 21,272.26 and 9,443.72 is: 13,029.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,418.28 : 21,272.26 = 9,443.72 : x
  2. Step 2: Convert to fraction form
    15,418.28/21,272.26 = 9,443.72/x
  3. Step 3: Cross multiply
    15,418.28x = 21,272.26 × 9,443.72
  4. Step 4: Simplify right side
    15,418.28x = 200,889,267.21
  5. Step 5: Solve for x
    x = 200,889,267.21/15,418.28
  6. Step 6: Final answer
    x = 13,029.29

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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.