Home / 12,345.39-18,558.18-9,906.87

Finding the Fourth Proportional to 12,345.39, 18,558.18 and 9,906.87

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Solution

The fourth proportional to 12,345.39, 18,558.18 and 9,906.87 is: 14,892.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,345.39 : 18,558.18 = 9,906.87 : x
  2. Step 2: Convert to fraction form
    12,345.39/18,558.18 = 9,906.87/x
  3. Step 3: Cross multiply
    12,345.39x = 18,558.18 × 9,906.87
  4. Step 4: Simplify right side
    12,345.39x = 183,853,476.70
  5. Step 5: Solve for x
    x = 183,853,476.70/12,345.39
  6. Step 6: Final answer
    x = 14,892.48

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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.