Home / 20,420.68-30,635.34-7,277.08

Finding the Fourth Proportional to 20,420.68, 30,635.34 and 7,277.08

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Solution

The fourth proportional to 20,420.68, 30,635.34 and 7,277.08 is: 10,917.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,420.68 : 30,635.34 = 7,277.08 : x
  2. Step 2: Convert to fraction form
    20,420.68/30,635.34 = 7,277.08/x
  3. Step 3: Cross multiply
    20,420.68x = 30,635.34 × 7,277.08
  4. Step 4: Simplify right side
    20,420.68x = 222,935,820.01
  5. Step 5: Solve for x
    x = 222,935,820.01/20,420.68
  6. Step 6: Final answer
    x = 10,917.16

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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.