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Finding the Fourth Proportional to 10,865.52, 14,994.18 and 6,389.64

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Solution

The fourth proportional to 10,865.52, 14,994.18 and 6,389.64 is: 8,817.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,865.52 : 14,994.18 = 6,389.64 : x
  2. Step 2: Convert to fraction form
    10,865.52/14,994.18 = 6,389.64/x
  3. Step 3: Cross multiply
    10,865.52x = 14,994.18 × 6,389.64
  4. Step 4: Simplify right side
    10,865.52x = 95,807,412.30
  5. Step 5: Solve for x
    x = 95,807,412.30/10,865.52
  6. Step 6: Final answer
    x = 8,817.56

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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.