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Finding the Fourth Proportional to 8,947.73, 12,345.91 and 5,410.87

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Solution

The fourth proportional to 8,947.73, 12,345.91 and 5,410.87 is: 7,465.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,947.73 : 12,345.91 = 5,410.87 : x
  2. Step 2: Convert to fraction form
    8,947.73/12,345.91 = 5,410.87/x
  3. Step 3: Cross multiply
    8,947.73x = 12,345.91 × 5,410.87
  4. Step 4: Simplify right side
    8,947.73x = 66,802,069.65
  5. Step 5: Solve for x
    x = 66,802,069.65/8,947.73
  6. Step 6: Final answer
    x = 7,465.81

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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.