Home / 20,431.24-30,634.50-13,320.75

Finding the Fourth Proportional to 20,431.24, 30,634.50 and 13,320.75

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Solution

The fourth proportional to 20,431.24, 30,634.50 and 13,320.75 is: 19,973.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,431.24 : 30,634.50 = 13,320.75 : x
  2. Step 2: Convert to fraction form
    20,431.24/30,634.50 = 13,320.75/x
  3. Step 3: Cross multiply
    20,431.24x = 30,634.50 × 13,320.75
  4. Step 4: Simplify right side
    20,431.24x = 408,074,680.71
  5. Step 5: Solve for x
    x = 408,074,680.71/20,431.24
  6. Step 6: Final answer
    x = 19,973.08

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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.