Home / 28,218.75-38,942.63-15,953.19

Finding the Fourth Proportional to 28,218.75, 38,942.63 and 15,953.19

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Solution

The fourth proportional to 28,218.75, 38,942.63 and 15,953.19 is: 22,015.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,218.75 : 38,942.63 = 15,953.19 : x
  2. Step 2: Convert to fraction form
    28,218.75/38,942.63 = 15,953.19/x
  3. Step 3: Cross multiply
    28,218.75x = 38,942.63 × 15,953.19
  4. Step 4: Simplify right side
    28,218.75x = 621,259,095.72
  5. Step 5: Solve for x
    x = 621,259,095.72/28,218.75
  6. Step 6: Final answer
    x = 22,015.83

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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.