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Finding the Fourth Proportional to 10,865.16, 14,994.09 and 6,389.01

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Solution

The fourth proportional to 10,865.16, 14,994.09 and 6,389.01 is: 8,816.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,865.16 : 14,994.09 = 6,389.01 : x
  2. Step 2: Convert to fraction form
    10,865.16/14,994.09 = 6,389.01/x
  3. Step 3: Cross multiply
    10,865.16x = 14,994.09 × 6,389.01
  4. Step 4: Simplify right side
    10,865.16x = 95,797,390.95
  5. Step 5: Solve for x
    x = 95,797,390.95/10,865.16
  6. Step 6: Final answer
    x = 8,816.93

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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.