Home / 31,511.09-47,217.38-19,799.70

Finding the Fourth Proportional to 31,511.09, 47,217.38 and 19,799.70

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Solution

The fourth proportional to 31,511.09, 47,217.38 and 19,799.70 is: 29,668.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,511.09 : 47,217.38 = 19,799.70 : x
  2. Step 2: Convert to fraction form
    31,511.09/47,217.38 = 19,799.70/x
  3. Step 3: Cross multiply
    31,511.09x = 47,217.38 × 19,799.70
  4. Step 4: Simplify right side
    31,511.09x = 934,889,958.79
  5. Step 5: Solve for x
    x = 934,889,958.79/31,511.09
  6. Step 6: Final answer
    x = 29,668.60

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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.