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Finding the Fourth Proportional to 18,245.55, 25,178.90 and 9,862.05

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Solution

The fourth proportional to 18,245.55, 25,178.90 and 9,862.05 is: 13,609.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,245.55 : 25,178.90 = 9,862.05 : x
  2. Step 2: Convert to fraction form
    18,245.55/25,178.90 = 9,862.05/x
  3. Step 3: Cross multiply
    18,245.55x = 25,178.90 × 9,862.05
  4. Step 4: Simplify right side
    18,245.55x = 248,315,671.33
  5. Step 5: Solve for x
    x = 248,315,671.33/18,245.55
  6. Step 6: Final answer
    x = 13,609.65

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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.