Home / 21,867.12-30,175.68-12,435.60

Finding the Fourth Proportional to 21,867.12, 30,175.68 and 12,435.60

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Solution

The fourth proportional to 21,867.12, 30,175.68 and 12,435.60 is: 17,160.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,867.12 : 30,175.68 = 12,435.60 : x
  2. Step 2: Convert to fraction form
    21,867.12/30,175.68 = 12,435.60/x
  3. Step 3: Cross multiply
    21,867.12x = 30,175.68 × 12,435.60
  4. Step 4: Simplify right side
    21,867.12x = 375,252,686.21
  5. Step 5: Solve for x
    x = 375,252,686.21/21,867.12
  6. Step 6: Final answer
    x = 17,160.59

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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.