Home / 20,705.44-28,572.78-11,273.80

Finding the Fourth Proportional to 20,705.44, 28,572.78 and 11,273.80

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Solution

The fourth proportional to 20,705.44, 28,572.78 and 11,273.80 is: 15,557.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,705.44 : 28,572.78 = 11,273.80 : x
  2. Step 2: Convert to fraction form
    20,705.44/28,572.78 = 11,273.80/x
  3. Step 3: Cross multiply
    20,705.44x = 28,572.78 × 11,273.80
  4. Step 4: Simplify right side
    20,705.44x = 322,123,807.16
  5. Step 5: Solve for x
    x = 322,123,807.16/20,705.44
  6. Step 6: Final answer
    x = 15,557.45

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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.