Home / 20,521.78-30,764.50-8,050.75

Finding the Fourth Proportional to 20,521.78, 30,764.50 and 8,050.75

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Solution

The fourth proportional to 20,521.78, 30,764.50 and 8,050.75 is: 12,069.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,521.78 : 30,764.50 = 8,050.75 : x
  2. Step 2: Convert to fraction form
    20,521.78/30,764.50 = 8,050.75/x
  3. Step 3: Cross multiply
    20,521.78x = 30,764.50 × 8,050.75
  4. Step 4: Simplify right side
    20,521.78x = 247,677,298.38
  5. Step 5: Solve for x
    x = 247,677,298.38/20,521.78
  6. Step 6: Final answer
    x = 12,069.00

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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.