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Finding the Fourth Proportional to 12,561.17, 18,841.74 and 9,789.90

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Solution

The fourth proportional to 12,561.17, 18,841.74 and 9,789.90 is: 14,684.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,561.17 : 18,841.74 = 9,789.90 : x
  2. Step 2: Convert to fraction form
    12,561.17/18,841.74 = 9,789.90/x
  3. Step 3: Cross multiply
    12,561.17x = 18,841.74 × 9,789.90
  4. Step 4: Simplify right side
    12,561.17x = 184,458,750.43
  5. Step 5: Solve for x
    x = 184,458,750.43/12,561.17
  6. Step 6: Final answer
    x = 14,684.84

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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.