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Finding the Fourth Proportional to 12,612.91, 17,405.93 and 6,947.68

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Solution

The fourth proportional to 12,612.91, 17,405.93 and 6,947.68 is: 9,587.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,612.91 : 17,405.93 = 6,947.68 : x
  2. Step 2: Convert to fraction form
    12,612.91/17,405.93 = 6,947.68/x
  3. Step 3: Cross multiply
    12,612.91x = 17,405.93 × 6,947.68
  4. Step 4: Simplify right side
    12,612.91x = 120,930,870.87
  5. Step 5: Solve for x
    x = 120,930,870.87/12,612.91
  6. Step 6: Final answer
    x = 9,587.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.