Home / 20,709.80-31,068.70-8,863.40

Finding the Fourth Proportional to 20,709.80, 31,068.70 and 8,863.40

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Solution

The fourth proportional to 20,709.80, 31,068.70 and 8,863.40 is: 13,296.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,709.80 : 31,068.70 = 8,863.40 : x
  2. Step 2: Convert to fraction form
    20,709.80/31,068.70 = 8,863.40/x
  3. Step 3: Cross multiply
    20,709.80x = 31,068.70 × 8,863.40
  4. Step 4: Simplify right side
    20,709.80x = 275,374,315.58
  5. Step 5: Solve for x
    x = 275,374,315.58/20,709.80
  6. Step 6: Final answer
    x = 13,296.81

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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.