Home / 20,691.95-28,554.98-11,260.50

Finding the Fourth Proportional to 20,691.95, 28,554.98 and 11,260.50

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Solution

The fourth proportional to 20,691.95, 28,554.98 and 11,260.50 is: 15,539.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,691.95 : 28,554.98 = 11,260.50 : x
  2. Step 2: Convert to fraction form
    20,691.95/28,554.98 = 11,260.50/x
  3. Step 3: Cross multiply
    20,691.95x = 28,554.98 × 11,260.50
  4. Step 4: Simplify right side
    20,691.95x = 321,543,295.99
  5. Step 5: Solve for x
    x = 321,543,295.99/20,691.95
  6. Step 6: Final answer
    x = 15,539.54

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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.