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Finding the Fourth Proportional to 18,210.22, 27,321.86 and 7,124.87

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Solution

The fourth proportional to 18,210.22, 27,321.86 and 7,124.87 is: 10,689.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,210.22 : 27,321.86 = 7,124.87 : x
  2. Step 2: Convert to fraction form
    18,210.22/27,321.86 = 7,124.87/x
  3. Step 3: Cross multiply
    18,210.22x = 27,321.86 × 7,124.87
  4. Step 4: Simplify right side
    18,210.22x = 194,664,700.66
  5. Step 5: Solve for x
    x = 194,664,700.66/18,210.22
  6. Step 6: Final answer
    x = 10,689.86

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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.