Home / 20,812.13-31,218.22-8,500.13

Finding the Fourth Proportional to 20,812.13, 31,218.22 and 8,500.13

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Solution

The fourth proportional to 20,812.13, 31,218.22 and 8,500.13 is: 12,750.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,812.13 : 31,218.22 = 8,500.13 : x
  2. Step 2: Convert to fraction form
    20,812.13/31,218.22 = 8,500.13/x
  3. Step 3: Cross multiply
    20,812.13x = 31,218.22 × 8,500.13
  4. Step 4: Simplify right side
    20,812.13x = 265,358,928.37
  5. Step 5: Solve for x
    x = 265,358,928.37/20,812.13
  6. Step 6: Final answer
    x = 12,750.21

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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.