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Finding the Fourth Proportional to 31,995.61, 47,993.68 and 20,972.11

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Solution

The fourth proportional to 31,995.61, 47,993.68 and 20,972.11 is: 31,458.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,995.61 : 47,993.68 = 20,972.11 : x
  2. Step 2: Convert to fraction form
    31,995.61/47,993.68 = 20,972.11/x
  3. Step 3: Cross multiply
    31,995.61x = 47,993.68 × 20,972.11
  4. Step 4: Simplify right side
    31,995.61x = 1,006,528,736.26
  5. Step 5: Solve for x
    x = 1,006,528,736.26/31,995.61
  6. Step 6: Final answer
    x = 31,458.34

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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.