Home / 15,520.97-21,418.26-8,447.37

Finding the Fourth Proportional to 15,520.97, 21,418.26 and 8,447.37

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Solution

The fourth proportional to 15,520.97, 21,418.26 and 8,447.37 is: 11,657.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,520.97 : 21,418.26 = 8,447.37 : x
  2. Step 2: Convert to fraction form
    15,520.97/21,418.26 = 8,447.37/x
  3. Step 3: Cross multiply
    15,520.97x = 21,418.26 × 8,447.37
  4. Step 4: Simplify right side
    15,520.97x = 180,927,966.98
  5. Step 5: Solve for x
    x = 180,927,966.98/15,520.97
  6. Step 6: Final answer
    x = 11,657.01

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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.