Home / 20,703.26-31,054.90-12,385.70

Finding the Fourth Proportional to 20,703.26, 31,054.90 and 12,385.70

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Solution

The fourth proportional to 20,703.26, 31,054.90 and 12,385.70 is: 18,578.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,703.26 : 31,054.90 = 12,385.70 : x
  2. Step 2: Convert to fraction form
    20,703.26/31,054.90 = 12,385.70/x
  3. Step 3: Cross multiply
    20,703.26x = 31,054.90 × 12,385.70
  4. Step 4: Simplify right side
    20,703.26x = 384,636,674.93
  5. Step 5: Solve for x
    x = 384,636,674.93/20,703.26
  6. Step 6: Final answer
    x = 18,578.56

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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.