Home / 18,987.55-26,202.85-11,029.78

Finding the Fourth Proportional to 18,987.55, 26,202.85 and 11,029.78

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Solution

The fourth proportional to 18,987.55, 26,202.85 and 11,029.78 is: 15,221.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,987.55 : 26,202.85 = 11,029.78 : x
  2. Step 2: Convert to fraction form
    18,987.55/26,202.85 = 11,029.78/x
  3. Step 3: Cross multiply
    18,987.55x = 26,202.85 × 11,029.78
  4. Step 4: Simplify right side
    18,987.55x = 289,011,676.05
  5. Step 5: Solve for x
    x = 289,011,676.05/18,987.55
  6. Step 6: Final answer
    x = 15,221.12

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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.