Home / 21,780.74-30,057.20-11,844.74

Finding the Fourth Proportional to 21,780.74, 30,057.20 and 11,844.74

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Solution

The fourth proportional to 21,780.74, 30,057.20 and 11,844.74 is: 16,345.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,780.74 : 30,057.20 = 11,844.74 : x
  2. Step 2: Convert to fraction form
    21,780.74/30,057.20 = 11,844.74/x
  3. Step 3: Cross multiply
    21,780.74x = 30,057.20 × 11,844.74
  4. Step 4: Simplify right side
    21,780.74x = 356,019,719.13
  5. Step 5: Solve for x
    x = 356,019,719.13/21,780.74
  6. Step 6: Final answer
    x = 16,345.62

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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.