Home / 15,521.06-21,419.17-8,447.54

Finding the Fourth Proportional to 15,521.06, 21,419.17 and 8,447.54

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Solution

The fourth proportional to 15,521.06, 21,419.17 and 8,447.54 is: 11,657.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,521.06 : 21,419.17 = 8,447.54 : x
  2. Step 2: Convert to fraction form
    15,521.06/21,419.17 = 8,447.54/x
  3. Step 3: Cross multiply
    15,521.06x = 21,419.17 × 8,447.54
  4. Step 4: Simplify right side
    15,521.06x = 180,939,167.13
  5. Step 5: Solve for x
    x = 180,939,167.13/15,521.06
  6. Step 6: Final answer
    x = 11,657.65

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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.