Home / 21,788.15-30,057.18-13,816.49

Finding the Fourth Proportional to 21,788.15, 30,057.18 and 13,816.49

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Solution

The fourth proportional to 21,788.15, 30,057.18 and 13,816.49 is: 19,060.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,788.15 : 30,057.18 = 13,816.49 : x
  2. Step 2: Convert to fraction form
    21,788.15/30,057.18 = 13,816.49/x
  3. Step 3: Cross multiply
    21,788.15x = 30,057.18 × 13,816.49
  4. Step 4: Simplify right side
    21,788.15x = 415,284,726.90
  5. Step 5: Solve for x
    x = 415,284,726.90/21,788.15
  6. Step 6: Final answer
    x = 19,060.12

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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.