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Finding the Fourth Proportional to 28,081.50, 38,752.47 and 18,145.50

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Solution

The fourth proportional to 28,081.50, 38,752.47 and 18,145.50 is: 25,040.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,081.50 : 38,752.47 = 18,145.50 : x
  2. Step 2: Convert to fraction form
    28,081.50/38,752.47 = 18,145.50/x
  3. Step 3: Cross multiply
    28,081.50x = 38,752.47 × 18,145.50
  4. Step 4: Simplify right side
    28,081.50x = 703,182,944.39
  5. Step 5: Solve for x
    x = 703,182,944.39/28,081.50
  6. Step 6: Final answer
    x = 25,040.79

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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.