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Finding the Fourth Proportional to 20,255.93, 30,386.93 and 7,105.99

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Solution

The fourth proportional to 20,255.93, 30,386.93 and 7,105.99 is: 10,660.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,255.93 : 30,386.93 = 7,105.99 : x
  2. Step 2: Convert to fraction form
    20,255.93/30,386.93 = 7,105.99/x
  3. Step 3: Cross multiply
    20,255.93x = 30,386.93 × 7,105.99
  4. Step 4: Simplify right side
    20,255.93x = 215,929,162.51
  5. Step 5: Solve for x
    x = 215,929,162.51/20,255.93
  6. Step 6: Final answer
    x = 10,660.05

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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.