Home / 12,578.20-18,867.30-11,217.40

Finding the Fourth Proportional to 12,578.20, 18,867.30 and 11,217.40

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Solution

The fourth proportional to 12,578.20, 18,867.30 and 11,217.40 is: 16,826.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,578.20 : 18,867.30 = 11,217.40 : x
  2. Step 2: Convert to fraction form
    12,578.20/18,867.30 = 11,217.40/x
  3. Step 3: Cross multiply
    12,578.20x = 18,867.30 × 11,217.40
  4. Step 4: Simplify right side
    12,578.20x = 211,642,051.02
  5. Step 5: Solve for x
    x = 211,642,051.02/12,578.20
  6. Step 6: Final answer
    x = 16,826.10

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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.