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Finding the Fourth Proportional to 8,364.87, 12,547.91 and 2,818.21

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Solution

The fourth proportional to 8,364.87, 12,547.91 and 2,818.21 is: 4,227.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,364.87 : 12,547.91 = 2,818.21 : x
  2. Step 2: Convert to fraction form
    8,364.87/12,547.91 = 2,818.21/x
  3. Step 3: Cross multiply
    8,364.87x = 12,547.91 × 2,818.21
  4. Step 4: Simplify right side
    8,364.87x = 35,362,645.44
  5. Step 5: Solve for x
    x = 35,362,645.44/8,364.87
  6. Step 6: Final answer
    x = 4,227.52

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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.