Home / 20,865.15-31,276.67-9,176.31

Finding the Fourth Proportional to 20,865.15, 31,276.67 and 9,176.31

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Solution

The fourth proportional to 20,865.15, 31,276.67 and 9,176.31 is: 13,755.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,865.15 : 31,276.67 = 9,176.31 : x
  2. Step 2: Convert to fraction form
    20,865.15/31,276.67 = 9,176.31/x
  3. Step 3: Cross multiply
    20,865.15x = 31,276.67 × 9,176.31
  4. Step 4: Simplify right side
    20,865.15x = 287,004,373.81
  5. Step 5: Solve for x
    x = 287,004,373.81/20,865.15
  6. Step 6: Final answer
    x = 13,755.20

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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.