Home / 20,705.12-28,572.16-11,273.68

Finding the Fourth Proportional to 20,705.12, 28,572.16 and 11,273.68

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Solution

The fourth proportional to 20,705.12, 28,572.16 and 11,273.68 is: 15,557.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,705.12 : 28,572.16 = 11,273.68 : x
  2. Step 2: Convert to fraction form
    20,705.12/28,572.16 = 11,273.68/x
  3. Step 3: Cross multiply
    20,705.12x = 28,572.16 × 11,273.68
  4. Step 4: Simplify right side
    20,705.12x = 322,113,388.75
  5. Step 5: Solve for x
    x = 322,113,388.75/20,705.12
  6. Step 6: Final answer
    x = 15,557.19

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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.