Home / 12,121.46-18,171.18-4,328.45

Finding the Fourth Proportional to 12,121.46, 18,171.18 and 4,328.45

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Solution

The fourth proportional to 12,121.46, 18,171.18 and 4,328.45 is: 6,488.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,121.46 : 18,171.18 = 4,328.45 : x
  2. Step 2: Convert to fraction form
    12,121.46/18,171.18 = 4,328.45/x
  3. Step 3: Cross multiply
    12,121.46x = 18,171.18 × 4,328.45
  4. Step 4: Simplify right side
    12,121.46x = 78,653,044.07
  5. Step 5: Solve for x
    x = 78,653,044.07/12,121.46
  6. Step 6: Final answer
    x = 6,488.74

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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.