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Finding the Fourth Proportional to 12,924.80, 19,342.40 and 7,734.40

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Solution

The fourth proportional to 12,924.80, 19,342.40 and 7,734.40 is: 11,574.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,924.80 : 19,342.40 = 7,734.40 : x
  2. Step 2: Convert to fraction form
    12,924.80/19,342.40 = 7,734.40/x
  3. Step 3: Cross multiply
    12,924.80x = 19,342.40 × 7,734.40
  4. Step 4: Simplify right side
    12,924.80x = 149,601,858.56
  5. Step 5: Solve for x
    x = 149,601,858.56/12,924.80
  6. Step 6: Final answer
    x = 11,574.79

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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.