Home / 18,180.42-25,090.88-11,111.55

Finding the Fourth Proportional to 18,180.42, 25,090.88 and 11,111.55

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Solution

The fourth proportional to 18,180.42, 25,090.88 and 11,111.55 is: 15,335.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,180.42 : 25,090.88 = 11,111.55 : x
  2. Step 2: Convert to fraction form
    18,180.42/25,090.88 = 11,111.55/x
  3. Step 3: Cross multiply
    18,180.42x = 25,090.88 × 11,111.55
  4. Step 4: Simplify right side
    18,180.42x = 278,798,512.11
  5. Step 5: Solve for x
    x = 278,798,512.11/18,180.42
  6. Step 6: Final answer
    x = 15,335.10

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Half scale
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Double scale
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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.