Home / 20,278.56-30,420.27-7,795.68

Finding the Fourth Proportional to 20,278.56, 30,420.27 and 7,795.68

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Solution

The fourth proportional to 20,278.56, 30,420.27 and 7,795.68 is: 11,694.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,278.56 : 30,420.27 = 7,795.68 : x
  2. Step 2: Convert to fraction form
    20,278.56/30,420.27 = 7,795.68/x
  3. Step 3: Cross multiply
    20,278.56x = 30,420.27 × 7,795.68
  4. Step 4: Simplify right side
    20,278.56x = 237,146,690.43
  5. Step 5: Solve for x
    x = 237,146,690.43/20,278.56
  6. Step 6: Final answer
    x = 11,694.45

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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.