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Finding the Fourth Proportional to 18,765.16, 28,155.18 and 7,081.48

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Solution

The fourth proportional to 18,765.16, 28,155.18 and 7,081.48 is: 10,625.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,765.16 : 28,155.18 = 7,081.48 : x
  2. Step 2: Convert to fraction form
    18,765.16/28,155.18 = 7,081.48/x
  3. Step 3: Cross multiply
    18,765.16x = 28,155.18 × 7,081.48
  4. Step 4: Simplify right side
    18,765.16x = 199,380,344.07
  5. Step 5: Solve for x
    x = 199,380,344.07/18,765.16
  6. Step 6: Final answer
    x = 10,625.03

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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.