Home / 15,418.82-21,278.97-8,701.99

Finding the Fourth Proportional to 15,418.82, 21,278.97 and 8,701.99

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Solution

The fourth proportional to 15,418.82, 21,278.97 and 8,701.99 is: 12,009.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,418.82 : 21,278.97 = 8,701.99 : x
  2. Step 2: Convert to fraction form
    15,418.82/21,278.97 = 8,701.99/x
  3. Step 3: Cross multiply
    15,418.82x = 21,278.97 × 8,701.99
  4. Step 4: Simplify right side
    15,418.82x = 185,169,384.15
  5. Step 5: Solve for x
    x = 185,169,384.15/15,418.82
  6. Step 6: Final answer
    x = 12,009.31

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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.