Home / 15,521.22-21,419.28-8,447.69

Finding the Fourth Proportional to 15,521.22, 21,419.28 and 8,447.69

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Solution

The fourth proportional to 15,521.22, 21,419.28 and 8,447.69 is: 11,657.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,521.22 : 21,419.28 = 8,447.69 : x
  2. Step 2: Convert to fraction form
    15,521.22/21,419.28 = 8,447.69/x
  3. Step 3: Cross multiply
    15,521.22x = 21,419.28 × 8,447.69
  4. Step 4: Simplify right side
    15,521.22x = 180,943,512.13
  5. Step 5: Solve for x
    x = 180,943,512.13/15,521.22
  6. Step 6: Final answer
    x = 11,657.82

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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.