Home / 20,783.85-31,164.83-14,211.91

Finding the Fourth Proportional to 20,783.85, 31,164.83 and 14,211.91

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Solution

The fourth proportional to 20,783.85, 31,164.83 and 14,211.91 is: 21,310.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,783.85 : 31,164.83 = 14,211.91 : x
  2. Step 2: Convert to fraction form
    20,783.85/31,164.83 = 14,211.91/x
  3. Step 3: Cross multiply
    20,783.85x = 31,164.83 × 14,211.91
  4. Step 4: Simplify right side
    20,783.85x = 442,911,759.13
  5. Step 5: Solve for x
    x = 442,911,759.13/20,783.85
  6. Step 6: Final answer
    x = 21,310.38

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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.