Home / 20,703.86-31,035.54-8,219.74

Finding the Fourth Proportional to 20,703.86, 31,035.54 and 8,219.74

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Solution

The fourth proportional to 20,703.86, 31,035.54 and 8,219.74 is: 12,321.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,703.86 : 31,035.54 = 8,219.74 : x
  2. Step 2: Convert to fraction form
    20,703.86/31,035.54 = 8,219.74/x
  3. Step 3: Cross multiply
    20,703.86x = 31,035.54 × 8,219.74
  4. Step 4: Simplify right side
    20,703.86x = 255,103,914.38
  5. Step 5: Solve for x
    x = 255,103,914.38/20,703.86
  6. Step 6: Final answer
    x = 12,321.56

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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.