Home / 20,277.81-30,403.58-8,439.71

Finding the Fourth Proportional to 20,277.81, 30,403.58 and 8,439.71

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Solution

The fourth proportional to 20,277.81, 30,403.58 and 8,439.71 is: 12,654.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,277.81 : 30,403.58 = 8,439.71 : x
  2. Step 2: Convert to fraction form
    20,277.81/30,403.58 = 8,439.71/x
  3. Step 3: Cross multiply
    20,277.81x = 30,403.58 × 8,439.71
  4. Step 4: Simplify right side
    20,277.81x = 256,597,203.95
  5. Step 5: Solve for x
    x = 256,597,203.95/20,277.81
  6. Step 6: Final answer
    x = 12,654.09

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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.