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Finding the Fourth Proportional to 8,557.80, 11,805.39 and 5,578.62

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Solution

The fourth proportional to 8,557.80, 11,805.39 and 5,578.62 is: 7,695.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,557.80 : 11,805.39 = 5,578.62 : x
  2. Step 2: Convert to fraction form
    8,557.80/11,805.39 = 5,578.62/x
  3. Step 3: Cross multiply
    8,557.80x = 11,805.39 × 5,578.62
  4. Step 4: Simplify right side
    8,557.80x = 65,857,784.76
  5. Step 5: Solve for x
    x = 65,857,784.76/8,557.80
  6. Step 6: Final answer
    x = 7,695.64

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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.