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Finding the Fourth Proportional to 12,933.60, 19,362.60 and 9,661.20

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Solution

The fourth proportional to 12,933.60, 19,362.60 and 9,661.20 is: 14,463.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,933.60 : 19,362.60 = 9,661.20 : x
  2. Step 2: Convert to fraction form
    12,933.60/19,362.60 = 9,661.20/x
  3. Step 3: Cross multiply
    12,933.60x = 19,362.60 × 9,661.20
  4. Step 4: Simplify right side
    12,933.60x = 187,065,951.12
  5. Step 5: Solve for x
    x = 187,065,951.12/12,933.60
  6. Step 6: Final answer
    x = 14,463.56

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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.