Home / 20,521.59-30,782.39-4,939.21

Finding the Fourth Proportional to 20,521.59, 30,782.39 and 4,939.21

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Solution

The fourth proportional to 20,521.59, 30,782.39 and 4,939.21 is: 7,408.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,521.59 : 30,782.39 = 4,939.21 : x
  2. Step 2: Convert to fraction form
    20,521.59/30,782.39 = 4,939.21/x
  3. Step 3: Cross multiply
    20,521.59x = 30,782.39 × 4,939.21
  4. Step 4: Simplify right side
    20,521.59x = 152,040,740.77
  5. Step 5: Solve for x
    x = 152,040,740.77/20,521.59
  6. Step 6: Final answer
    x = 7,408.82

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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.