Home / 20,776.32-31,129.03-11,424.18

Finding the Fourth Proportional to 20,776.32, 31,129.03 and 11,424.18

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Solution

The fourth proportional to 20,776.32, 31,129.03 and 11,424.18 is: 17,116.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,776.32 : 31,129.03 = 11,424.18 : x
  2. Step 2: Convert to fraction form
    20,776.32/31,129.03 = 11,424.18/x
  3. Step 3: Cross multiply
    20,776.32x = 31,129.03 × 11,424.18
  4. Step 4: Simplify right side
    20,776.32x = 355,623,641.95
  5. Step 5: Solve for x
    x = 355,623,641.95/20,776.32
  6. Step 6: Final answer
    x = 17,116.78

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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.