Home / 20,887.16-31,346.30-8,407.28

Finding the Fourth Proportional to 20,887.16, 31,346.30 and 8,407.28

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Solution

The fourth proportional to 20,887.16, 31,346.30 and 8,407.28 is: 12,617.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,887.16 : 31,346.30 = 8,407.28 : x
  2. Step 2: Convert to fraction form
    20,887.16/31,346.30 = 8,407.28/x
  3. Step 3: Cross multiply
    20,887.16x = 31,346.30 × 8,407.28
  4. Step 4: Simplify right side
    20,887.16x = 263,536,922.30
  5. Step 5: Solve for x
    x = 263,536,922.30/20,887.16
  6. Step 6: Final answer
    x = 12,617.18

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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.