Home / 20,876.16-31,291.56-9,775.92

Finding the Fourth Proportional to 20,876.16, 31,291.56 and 9,775.92

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Solution

The fourth proportional to 20,876.16, 31,291.56 and 9,775.92 is: 14,653.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,876.16 : 31,291.56 = 9,775.92 : x
  2. Step 2: Convert to fraction form
    20,876.16/31,291.56 = 9,775.92/x
  3. Step 3: Cross multiply
    20,876.16x = 31,291.56 × 9,775.92
  4. Step 4: Simplify right side
    20,876.16x = 305,903,787.24
  5. Step 5: Solve for x
    x = 305,903,787.24/20,876.16
  6. Step 6: Final answer
    x = 14,653.26

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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.