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Finding the Fourth Proportional to 10,866.18, 14,995.08 and 6,388.95

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Solution

The fourth proportional to 10,866.18, 14,995.08 and 6,388.95 is: 8,816.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,866.18 : 14,995.08 = 6,388.95 : x
  2. Step 2: Convert to fraction form
    10,866.18/14,995.08 = 6,388.95/x
  3. Step 3: Cross multiply
    10,866.18x = 14,995.08 × 6,388.95
  4. Step 4: Simplify right side
    10,866.18x = 95,802,816.37
  5. Step 5: Solve for x
    x = 95,802,816.37/10,866.18
  6. Step 6: Final answer
    x = 8,816.60

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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.