Home / 20,263.88-30,429.44-12,521.90

Finding the Fourth Proportional to 20,263.88, 30,429.44 and 12,521.90

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Solution

The fourth proportional to 20,263.88, 30,429.44 and 12,521.90 is: 18,803.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,263.88 : 30,429.44 = 12,521.90 : x
  2. Step 2: Convert to fraction form
    20,263.88/30,429.44 = 12,521.90/x
  3. Step 3: Cross multiply
    20,263.88x = 30,429.44 × 12,521.90
  4. Step 4: Simplify right side
    20,263.88x = 381,034,189.98
  5. Step 5: Solve for x
    x = 381,034,189.98/20,263.88
  6. Step 6: Final answer
    x = 18,803.62

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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.