Home / 21,780.60-30,057.90-12,349.56

Finding the Fourth Proportional to 21,780.60, 30,057.90 and 12,349.56

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Solution

The fourth proportional to 21,780.60, 30,057.90 and 12,349.56 is: 17,042.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,780.60 : 30,057.90 = 12,349.56 : x
  2. Step 2: Convert to fraction form
    21,780.60/30,057.90 = 12,349.56/x
  3. Step 3: Cross multiply
    21,780.60x = 30,057.90 × 12,349.56
  4. Step 4: Simplify right side
    21,780.60x = 371,201,839.52
  5. Step 5: Solve for x
    x = 371,201,839.52/21,780.60
  6. Step 6: Final answer
    x = 17,042.77

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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.