Home / 20,809.76-31,214.66-11,449.40

Finding the Fourth Proportional to 20,809.76, 31,214.66 and 11,449.40

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Solution

The fourth proportional to 20,809.76, 31,214.66 and 11,449.40 is: 17,174.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,809.76 : 31,214.66 = 11,449.40 : x
  2. Step 2: Convert to fraction form
    20,809.76/31,214.66 = 11,449.40/x
  3. Step 3: Cross multiply
    20,809.76x = 31,214.66 × 11,449.40
  4. Step 4: Simplify right side
    20,809.76x = 357,389,128.20
  5. Step 5: Solve for x
    x = 357,389,128.20/20,809.76
  6. Step 6: Final answer
    x = 17,174.11

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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.