Home / 20,210.70-30,316.05-9,129.90

Finding the Fourth Proportional to 20,210.70, 30,316.05 and 9,129.90

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Solution

The fourth proportional to 20,210.70, 30,316.05 and 9,129.90 is: 13,694.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,210.70 : 30,316.05 = 9,129.90 : x
  2. Step 2: Convert to fraction form
    20,210.70/30,316.05 = 9,129.90/x
  3. Step 3: Cross multiply
    20,210.70x = 30,316.05 × 9,129.90
  4. Step 4: Simplify right side
    20,210.70x = 276,782,504.90
  5. Step 5: Solve for x
    x = 276,782,504.90/20,210.70
  6. Step 6: Final answer
    x = 13,694.85

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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.