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Finding the Fourth Proportional to 30,993.36, 42,759 and 19,052.88

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Solution

The fourth proportional to 30,993.36, 42,759 and 19,052.88 is: 26,285.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,993.36 : 42,759 = 19,052.88 : x
  2. Step 2: Convert to fraction form
    30,993.36/42,759 = 19,052.88/x
  3. Step 3: Cross multiply
    30,993.36x = 42,759 × 19,052.88
  4. Step 4: Simplify right side
    30,993.36x = 814,682,095.92
  5. Step 5: Solve for x
    x = 814,682,095.92/30,993.36
  6. Step 6: Final answer
    x = 26,285.70

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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.