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Finding the Fourth Proportional to 12,612.50, 17,405.65 and 6,947.56

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Solution

The fourth proportional to 12,612.50, 17,405.65 and 6,947.56 is: 9,587.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,612.50 : 17,405.65 = 6,947.56 : x
  2. Step 2: Convert to fraction form
    12,612.50/17,405.65 = 6,947.56/x
  3. Step 3: Cross multiply
    12,612.50x = 17,405.65 × 6,947.56
  4. Step 4: Simplify right side
    12,612.50x = 120,926,797.71
  5. Step 5: Solve for x
    x = 120,926,797.71/12,612.50
  6. Step 6: Final answer
    x = 9,587.85

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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.