Home / 21,874.10-30,186.18-12,442.68

Finding the Fourth Proportional to 21,874.10, 30,186.18 and 12,442.68

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Solution

The fourth proportional to 21,874.10, 30,186.18 and 12,442.68 is: 17,170.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,874.10 : 30,186.18 = 12,442.68 : x
  2. Step 2: Convert to fraction form
    21,874.10/30,186.18 = 12,442.68/x
  3. Step 3: Cross multiply
    21,874.10x = 30,186.18 × 12,442.68
  4. Step 4: Simplify right side
    21,874.10x = 375,596,978.16
  5. Step 5: Solve for x
    x = 375,596,978.16/21,874.10
  6. Step 6: Final answer
    x = 17,170.86

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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.