Home / 19,995.75-30,011.82-10,643.61

Finding the Fourth Proportional to 19,995.75, 30,011.82 and 10,643.61

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Solution

The fourth proportional to 19,995.75, 30,011.82 and 10,643.61 is: 15,975.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,995.75 : 30,011.82 = 10,643.61 : x
  2. Step 2: Convert to fraction form
    19,995.75/30,011.82 = 10,643.61/x
  3. Step 3: Cross multiply
    19,995.75x = 30,011.82 × 10,643.61
  4. Step 4: Simplify right side
    19,995.75x = 319,434,107.47
  5. Step 5: Solve for x
    x = 319,434,107.47/19,995.75
  6. Step 6: Final answer
    x = 15,975.10

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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.