Home / 12,281.45-18,422.10-3,516.39

Finding the Fourth Proportional to 12,281.45, 18,422.10 and 3,516.39

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Solution

The fourth proportional to 12,281.45, 18,422.10 and 3,516.39 is: 5,274.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,281.45 : 18,422.10 = 3,516.39 : x
  2. Step 2: Convert to fraction form
    12,281.45/18,422.10 = 3,516.39/x
  3. Step 3: Cross multiply
    12,281.45x = 18,422.10 × 3,516.39
  4. Step 4: Simplify right side
    12,281.45x = 64,779,288.22
  5. Step 5: Solve for x
    x = 64,779,288.22/12,281.45
  6. Step 6: Final answer
    x = 5,274.56

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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.