Home / 15,371.20-21,211.44-9,081.28

Finding the Fourth Proportional to 15,371.20, 21,211.44 and 9,081.28

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Solution

The fourth proportional to 15,371.20, 21,211.44 and 9,081.28 is: 12,531.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,371.20 : 21,211.44 = 9,081.28 : x
  2. Step 2: Convert to fraction form
    15,371.20/21,211.44 = 9,081.28/x
  3. Step 3: Cross multiply
    15,371.20x = 21,211.44 × 9,081.28
  4. Step 4: Simplify right side
    15,371.20x = 192,627,025.84
  5. Step 5: Solve for x
    x = 192,627,025.84/15,371.20
  6. Step 6: Final answer
    x = 12,531.68

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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.