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Finding the Fourth Proportional to 12,688.97, 19,033.35 and 9,917.97

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Solution

The fourth proportional to 12,688.97, 19,033.35 and 9,917.97 is: 14,876.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,688.97 : 19,033.35 = 9,917.97 : x
  2. Step 2: Convert to fraction form
    12,688.97/19,033.35 = 9,917.97/x
  3. Step 3: Cross multiply
    12,688.97x = 19,033.35 × 9,917.97
  4. Step 4: Simplify right side
    12,688.97x = 188,772,144.71
  5. Step 5: Solve for x
    x = 188,772,144.71/12,688.97
  6. Step 6: Final answer
    x = 14,876.87

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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.