Home / 21,860.28-30,167.19-12,429.42

Finding the Fourth Proportional to 21,860.28, 30,167.19 and 12,429.42

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Solution

The fourth proportional to 21,860.28, 30,167.19 and 12,429.42 is: 17,152.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,860.28 : 30,167.19 = 12,429.42 : x
  2. Step 2: Convert to fraction form
    21,860.28/30,167.19 = 12,429.42/x
  3. Step 3: Cross multiply
    21,860.28x = 30,167.19 × 12,429.42
  4. Step 4: Simplify right side
    21,860.28x = 374,960,674.73
  5. Step 5: Solve for x
    x = 374,960,674.73/21,860.28
  6. Step 6: Final answer
    x = 17,152.60

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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.