Home / 21,920.45-32,847.78-13,145.72

Finding the Fourth Proportional to 21,920.45, 32,847.78 and 13,145.72

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Solution

The fourth proportional to 21,920.45, 32,847.78 and 13,145.72 is: 19,698.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,920.45 : 32,847.78 = 13,145.72 : x
  2. Step 2: Convert to fraction form
    21,920.45/32,847.78 = 13,145.72/x
  3. Step 3: Cross multiply
    21,920.45x = 32,847.78 × 13,145.72
  4. Step 4: Simplify right side
    21,920.45x = 431,807,718.50
  5. Step 5: Solve for x
    x = 431,807,718.50/21,920.45
  6. Step 6: Final answer
    x = 19,698.85

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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.