Home / 20,949.44-31,381.72-9,688.78

Finding the Fourth Proportional to 20,949.44, 31,381.72 and 9,688.78

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Solution

The fourth proportional to 20,949.44, 31,381.72 and 9,688.78 is: 14,513.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,949.44 : 31,381.72 = 9,688.78 : x
  2. Step 2: Convert to fraction form
    20,949.44/31,381.72 = 9,688.78/x
  3. Step 3: Cross multiply
    20,949.44x = 31,381.72 × 9,688.78
  4. Step 4: Simplify right side
    20,949.44x = 304,050,581.10
  5. Step 5: Solve for x
    x = 304,050,581.10/20,949.44
  6. Step 6: Final answer
    x = 14,513.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.