Home / 20,373.38-28,115.22-12,415.65

Finding the Fourth Proportional to 20,373.38, 28,115.22 and 12,415.65

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Solution

The fourth proportional to 20,373.38, 28,115.22 and 12,415.65 is: 17,133.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,373.38 : 28,115.22 = 12,415.65 : x
  2. Step 2: Convert to fraction form
    20,373.38/28,115.22 = 12,415.65/x
  3. Step 3: Cross multiply
    20,373.38x = 28,115.22 × 12,415.65
  4. Step 4: Simplify right side
    20,373.38x = 349,068,731.19
  5. Step 5: Solve for x
    x = 349,068,731.19/20,373.38
  6. Step 6: Final answer
    x = 17,133.57

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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.