Home / 20,888.18-28,825.73-11,456.82

Finding the Fourth Proportional to 20,888.18, 28,825.73 and 11,456.82

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Solution

The fourth proportional to 20,888.18, 28,825.73 and 11,456.82 is: 15,810.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,888.18 : 28,825.73 = 11,456.82 : x
  2. Step 2: Convert to fraction form
    20,888.18/28,825.73 = 11,456.82/x
  3. Step 3: Cross multiply
    20,888.18x = 28,825.73 × 11,456.82
  4. Step 4: Simplify right side
    20,888.18x = 330,251,199.98
  5. Step 5: Solve for x
    x = 330,251,199.98/20,888.18
  6. Step 6: Final answer
    x = 15,810.43

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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.