Home / 20,865.68-31,292.32-10,999.59

Finding the Fourth Proportional to 20,865.68, 31,292.32 and 10,999.59

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Solution

The fourth proportional to 20,865.68, 31,292.32 and 10,999.59 is: 16,496.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,865.68 : 31,292.32 = 10,999.59 : x
  2. Step 2: Convert to fraction form
    20,865.68/31,292.32 = 10,999.59/x
  3. Step 3: Cross multiply
    20,865.68x = 31,292.32 × 10,999.59
  4. Step 4: Simplify right side
    20,865.68x = 344,202,690.15
  5. Step 5: Solve for x
    x = 344,202,690.15/20,865.68
  6. Step 6: Final answer
    x = 16,496.12

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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.