Home / 20,816.76-31,212.18-9,718.68

Finding the Fourth Proportional to 20,816.76, 31,212.18 and 9,718.68

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Solution

The fourth proportional to 20,816.76, 31,212.18 and 9,718.68 is: 14,571.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,816.76 : 31,212.18 = 9,718.68 : x
  2. Step 2: Convert to fraction form
    20,816.76/31,212.18 = 9,718.68/x
  3. Step 3: Cross multiply
    20,816.76x = 31,212.18 × 9,718.68
  4. Step 4: Simplify right side
    20,816.76x = 303,341,189.52
  5. Step 5: Solve for x
    x = 303,341,189.52/20,816.76
  6. Step 6: Final answer
    x = 14,571.97

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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.