Home / 15,494.47-21,381.54-8,780.18

Finding the Fourth Proportional to 15,494.47, 21,381.54 and 8,780.18

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Solution

The fourth proportional to 15,494.47, 21,381.54 and 8,780.18 is: 12,116.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,494.47 : 21,381.54 = 8,780.18 : x
  2. Step 2: Convert to fraction form
    15,494.47/21,381.54 = 8,780.18/x
  3. Step 3: Cross multiply
    15,494.47x = 21,381.54 × 8,780.18
  4. Step 4: Simplify right side
    15,494.47x = 187,733,662.97
  5. Step 5: Solve for x
    x = 187,733,662.97/15,494.47
  6. Step 6: Final answer
    x = 12,116.18

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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.