Home / 20,926.98-28,879.10-11,366.78

Finding the Fourth Proportional to 20,926.98, 28,879.10 and 11,366.78

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Solution

The fourth proportional to 20,926.98, 28,879.10 and 11,366.78 is: 15,686.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,926.98 : 28,879.10 = 11,366.78 : x
  2. Step 2: Convert to fraction form
    20,926.98/28,879.10 = 11,366.78/x
  3. Step 3: Cross multiply
    20,926.98x = 28,879.10 × 11,366.78
  4. Step 4: Simplify right side
    20,926.98x = 328,262,376.30
  5. Step 5: Solve for x
    x = 328,262,376.30/20,926.98
  6. Step 6: Final answer
    x = 15,686.08

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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.