Home / 20,705.10-28,572.18-11,273.64

Finding the Fourth Proportional to 20,705.10, 28,572.18 and 11,273.64

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Solution

The fourth proportional to 20,705.10, 28,572.18 and 11,273.64 is: 15,557.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,705.10 : 28,572.18 = 11,273.64 : x
  2. Step 2: Convert to fraction form
    20,705.10/28,572.18 = 11,273.64/x
  3. Step 3: Cross multiply
    20,705.10x = 28,572.18 × 11,273.64
  4. Step 4: Simplify right side
    20,705.10x = 322,112,471.34
  5. Step 5: Solve for x
    x = 322,112,471.34/20,705.10
  6. Step 6: Final answer
    x = 15,557.16

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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.