Home / 20,656.18-28,505.45-11,705.38

Finding the Fourth Proportional to 20,656.18, 28,505.45 and 11,705.38

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Solution

The fourth proportional to 20,656.18, 28,505.45 and 11,705.38 is: 16,153.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,656.18 : 28,505.45 = 11,705.38 : x
  2. Step 2: Convert to fraction form
    20,656.18/28,505.45 = 11,705.38/x
  3. Step 3: Cross multiply
    20,656.18x = 28,505.45 × 11,705.38
  4. Step 4: Simplify right side
    20,656.18x = 333,667,242.66
  5. Step 5: Solve for x
    x = 333,667,242.66/20,656.18
  6. Step 6: Final answer
    x = 16,153.39

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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.