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Finding the Fourth Proportional to 10,530.70, 15,788.10 and 6,369.82

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Solution

The fourth proportional to 10,530.70, 15,788.10 and 6,369.82 is: 9,549.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,530.70 : 15,788.10 = 6,369.82 : x
  2. Step 2: Convert to fraction form
    10,530.70/15,788.10 = 6,369.82/x
  3. Step 3: Cross multiply
    10,530.70x = 15,788.10 × 6,369.82
  4. Step 4: Simplify right side
    10,530.70x = 100,567,355.14
  5. Step 5: Solve for x
    x = 100,567,355.14/10,530.70
  6. Step 6: Final answer
    x = 9,549.92

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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.