Home / 11,835.78-17,731.80-5,978.40

Finding the Fourth Proportional to 11,835.78, 17,731.80 and 5,978.40

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Solution

The fourth proportional to 11,835.78, 17,731.80 and 5,978.40 is: 8,956.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,835.78 : 17,731.80 = 5,978.40 : x
  2. Step 2: Convert to fraction form
    11,835.78/17,731.80 = 5,978.40/x
  3. Step 3: Cross multiply
    11,835.78x = 17,731.80 × 5,978.40
  4. Step 4: Simplify right side
    11,835.78x = 106,007,793.12
  5. Step 5: Solve for x
    x = 106,007,793.12/11,835.78
  6. Step 6: Final answer
    x = 8,956.55

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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.