Home / 12,143.50-18,213.20-3,379.30

Finding the Fourth Proportional to 12,143.50, 18,213.20 and 3,379.30

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Solution

The fourth proportional to 12,143.50, 18,213.20 and 3,379.30 is: 5,068.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,143.50 : 18,213.20 = 3,379.30 : x
  2. Step 2: Convert to fraction form
    12,143.50/18,213.20 = 3,379.30/x
  3. Step 3: Cross multiply
    12,143.50x = 18,213.20 × 3,379.30
  4. Step 4: Simplify right side
    12,143.50x = 61,547,866.76
  5. Step 5: Solve for x
    x = 61,547,866.76/12,143.50
  6. Step 6: Final answer
    x = 5,068.38

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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.