Home / 31,836.78-47,764.71-12,851.64

Finding the Fourth Proportional to 31,836.78, 47,764.71 and 12,851.64

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Solution

The fourth proportional to 31,836.78, 47,764.71 and 12,851.64 is: 19,281.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,836.78 : 47,764.71 = 12,851.64 : x
  2. Step 2: Convert to fraction form
    31,836.78/47,764.71 = 12,851.64/x
  3. Step 3: Cross multiply
    31,836.78x = 47,764.71 × 12,851.64
  4. Step 4: Simplify right side
    31,836.78x = 613,854,857.62
  5. Step 5: Solve for x
    x = 613,854,857.62/31,836.78
  6. Step 6: Final answer
    x = 19,281.31

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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.