Home / 15,521.29-21,418.66-8,447.69

Finding the Fourth Proportional to 15,521.29, 21,418.66 and 8,447.69

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Solution

The fourth proportional to 15,521.29, 21,418.66 and 8,447.69 is: 11,657.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,521.29 : 21,418.66 = 8,447.69 : x
  2. Step 2: Convert to fraction form
    15,521.29/21,418.66 = 8,447.69/x
  3. Step 3: Cross multiply
    15,521.29x = 21,418.66 × 8,447.69
  4. Step 4: Simplify right side
    15,521.29x = 180,938,199.90
  5. Step 5: Solve for x
    x = 180,938,199.90/15,521.29
  6. Step 6: Final answer
    x = 11,657.42

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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.