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Finding the Fourth Proportional to 12,803.12, 19,188.48 and 6,865.28

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Solution

The fourth proportional to 12,803.12, 19,188.48 and 6,865.28 is: 10,289.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,803.12 : 19,188.48 = 6,865.28 : x
  2. Step 2: Convert to fraction form
    12,803.12/19,188.48 = 6,865.28/x
  3. Step 3: Cross multiply
    12,803.12x = 19,188.48 × 6,865.28
  4. Step 4: Simplify right side
    12,803.12x = 131,734,287.97
  5. Step 5: Solve for x
    x = 131,734,287.97/12,803.12
  6. Step 6: Final answer
    x = 10,289.23

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1.5x scale

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.