Home / 20,867.92-31,280-9,765.26

Finding the Fourth Proportional to 20,867.92, 31,280 and 9,765.26

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Solution

The fourth proportional to 20,867.92, 31,280 and 9,765.26 is: 14,637.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,867.92 : 31,280 = 9,765.26 : x
  2. Step 2: Convert to fraction form
    20,867.92/31,280 = 9,765.26/x
  3. Step 3: Cross multiply
    20,867.92x = 31,280 × 9,765.26
  4. Step 4: Simplify right side
    20,867.92x = 305,457,332.80
  5. Step 5: Solve for x
    x = 305,457,332.80/20,867.92
  6. Step 6: Final answer
    x = 14,637.65

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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.