Home / 14,187.18-19,578.20-8,218.72

Finding the Fourth Proportional to 14,187.18, 19,578.20 and 8,218.72

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Solution

The fourth proportional to 14,187.18, 19,578.20 and 8,218.72 is: 11,341.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,187.18 : 19,578.20 = 8,218.72 : x
  2. Step 2: Convert to fraction form
    14,187.18/19,578.20 = 8,218.72/x
  3. Step 3: Cross multiply
    14,187.18x = 19,578.20 × 8,218.72
  4. Step 4: Simplify right side
    14,187.18x = 160,907,743.90
  5. Step 5: Solve for x
    x = 160,907,743.90/14,187.18
  6. Step 6: Final answer
    x = 11,341.77

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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.