Home / 12,783.39-19,177.70-5,387.85

Finding the Fourth Proportional to 12,783.39, 19,177.70 and 5,387.85

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Solution

The fourth proportional to 12,783.39, 19,177.70 and 5,387.85 is: 8,082.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,783.39 : 19,177.70 = 5,387.85 : x
  2. Step 2: Convert to fraction form
    12,783.39/19,177.70 = 5,387.85/x
  3. Step 3: Cross multiply
    12,783.39x = 19,177.70 × 5,387.85
  4. Step 4: Simplify right side
    12,783.39x = 103,326,544.01
  5. Step 5: Solve for x
    x = 103,326,544.01/12,783.39
  6. Step 6: Final answer
    x = 8,082.88

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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.