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Finding the Fourth Proportional to 18,806.60, 28,211.32 and 6,326.66

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Solution

The fourth proportional to 18,806.60, 28,211.32 and 6,326.66 is: 9,490.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,806.60 : 28,211.32 = 6,326.66 : x
  2. Step 2: Convert to fraction form
    18,806.60/28,211.32 = 6,326.66/x
  3. Step 3: Cross multiply
    18,806.60x = 28,211.32 × 6,326.66
  4. Step 4: Simplify right side
    18,806.60x = 178,483,429.79
  5. Step 5: Solve for x
    x = 178,483,429.79/18,806.60
  6. Step 6: Final answer
    x = 9,490.47

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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.