Home / 20,549.66-28,358.63-11,118.30

Finding the Fourth Proportional to 20,549.66, 28,358.63 and 11,118.30

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Solution

The fourth proportional to 20,549.66, 28,358.63 and 11,118.30 is: 15,343.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,549.66 : 28,358.63 = 11,118.30 : x
  2. Step 2: Convert to fraction form
    20,549.66/28,358.63 = 11,118.30/x
  3. Step 3: Cross multiply
    20,549.66x = 28,358.63 × 11,118.30
  4. Step 4: Simplify right side
    20,549.66x = 315,299,755.93
  5. Step 5: Solve for x
    x = 315,299,755.93/20,549.66
  6. Step 6: Final answer
    x = 15,343.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.