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Finding the Fourth Proportional to 31,101.80, 46,652.70 and 21,122.60

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Solution

The fourth proportional to 31,101.80, 46,652.70 and 21,122.60 is: 31,683.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,101.80 : 46,652.70 = 21,122.60 : x
  2. Step 2: Convert to fraction form
    31,101.80/46,652.70 = 21,122.60/x
  3. Step 3: Cross multiply
    31,101.80x = 46,652.70 × 21,122.60
  4. Step 4: Simplify right side
    31,101.80x = 985,426,321.02
  5. Step 5: Solve for x
    x = 985,426,321.02/31,101.80
  6. Step 6: Final answer
    x = 31,683.90

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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.