Home / 12,231.72-18,341.28-8,719.92

Finding the Fourth Proportional to 12,231.72, 18,341.28 and 8,719.92

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Solution

The fourth proportional to 12,231.72, 18,341.28 and 8,719.92 is: 13,075.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,231.72 : 18,341.28 = 8,719.92 : x
  2. Step 2: Convert to fraction form
    12,231.72/18,341.28 = 8,719.92/x
  3. Step 3: Cross multiply
    12,231.72x = 18,341.28 × 8,719.92
  4. Step 4: Simplify right side
    12,231.72x = 159,934,494.30
  5. Step 5: Solve for x
    x = 159,934,494.30/12,231.72
  6. Step 6: Final answer
    x = 13,075.39

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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.