Home / 20,909.91-31,323.85-12,126.37

Finding the Fourth Proportional to 20,909.91, 31,323.85 and 12,126.37

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Solution

The fourth proportional to 20,909.91, 31,323.85 and 12,126.37 is: 18,165.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,909.91 : 31,323.85 = 12,126.37 : x
  2. Step 2: Convert to fraction form
    20,909.91/31,323.85 = 12,126.37/x
  3. Step 3: Cross multiply
    20,909.91x = 31,323.85 × 12,126.37
  4. Step 4: Simplify right side
    20,909.91x = 379,844,594.92
  5. Step 5: Solve for x
    x = 379,844,594.92/20,909.91
  6. Step 6: Final answer
    x = 18,165.77

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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.