Home / 15,416.58-21,251.12-12,578.95

Finding the Fourth Proportional to 15,416.58, 21,251.12 and 12,578.95

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Solution

The fourth proportional to 15,416.58, 21,251.12 and 12,578.95 is: 17,339.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,416.58 : 21,251.12 = 12,578.95 : x
  2. Step 2: Convert to fraction form
    15,416.58/21,251.12 = 12,578.95/x
  3. Step 3: Cross multiply
    15,416.58x = 21,251.12 × 12,578.95
  4. Step 4: Simplify right side
    15,416.58x = 267,316,659.90
  5. Step 5: Solve for x
    x = 267,316,659.90/15,416.58
  6. Step 6: Final answer
    x = 17,339.56

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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.