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Finding the Fourth Proportional to 9,891.05, 13,658.90 and 6,360.39

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Solution

The fourth proportional to 9,891.05, 13,658.90 and 6,360.39 is: 8,783.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,891.05 : 13,658.90 = 6,360.39 : x
  2. Step 2: Convert to fraction form
    9,891.05/13,658.90 = 6,360.39/x
  3. Step 3: Cross multiply
    9,891.05x = 13,658.90 × 6,360.39
  4. Step 4: Simplify right side
    9,891.05x = 86,875,899.17
  5. Step 5: Solve for x
    x = 86,875,899.17/9,891.05
  6. Step 6: Final answer
    x = 8,783.29

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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.