Home / 20,260.48-30,390.54-7,109.78

Finding the Fourth Proportional to 20,260.48, 30,390.54 and 7,109.78

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Solution

The fourth proportional to 20,260.48, 30,390.54 and 7,109.78 is: 10,664.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,260.48 : 30,390.54 = 7,109.78 : x
  2. Step 2: Convert to fraction form
    20,260.48/30,390.54 = 7,109.78/x
  3. Step 3: Cross multiply
    20,260.48x = 30,390.54 × 7,109.78
  4. Step 4: Simplify right side
    20,260.48x = 216,070,053.48
  5. Step 5: Solve for x
    x = 216,070,053.48/20,260.48
  6. Step 6: Final answer
    x = 10,664.61

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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.