Home / 20,143.32-30,210.41-7,658.91

Finding the Fourth Proportional to 20,143.32, 30,210.41 and 7,658.91

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Solution

The fourth proportional to 20,143.32, 30,210.41 and 7,658.91 is: 11,486.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,143.32 : 30,210.41 = 7,658.91 : x
  2. Step 2: Convert to fraction form
    20,143.32/30,210.41 = 7,658.91/x
  3. Step 3: Cross multiply
    20,143.32x = 30,210.41 × 7,658.91
  4. Step 4: Simplify right side
    20,143.32x = 231,378,772.96
  5. Step 5: Solve for x
    x = 231,378,772.96/20,143.32
  6. Step 6: Final answer
    x = 11,486.63

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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.