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Finding the Fourth Proportional to 8,772.99, 12,114.81 and 5,634.65

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Solution

The fourth proportional to 8,772.99, 12,114.81 and 5,634.65 is: 7,781.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,772.99 : 12,114.81 = 5,634.65 : x
  2. Step 2: Convert to fraction form
    8,772.99/12,114.81 = 5,634.65/x
  3. Step 3: Cross multiply
    8,772.99x = 12,114.81 × 5,634.65
  4. Step 4: Simplify right side
    8,772.99x = 68,262,714.17
  5. Step 5: Solve for x
    x = 68,262,714.17/8,772.99
  6. Step 6: Final answer
    x = 7,781.01

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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.