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Finding the Fourth Proportional to 31,114.40, 46,671.60 and 18,672.80

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Solution

The fourth proportional to 31,114.40, 46,671.60 and 18,672.80 is: 28,009.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,114.40 : 46,671.60 = 18,672.80 : x
  2. Step 2: Convert to fraction form
    31,114.40/46,671.60 = 18,672.80/x
  3. Step 3: Cross multiply
    31,114.40x = 46,671.60 × 18,672.80
  4. Step 4: Simplify right side
    31,114.40x = 871,489,452.48
  5. Step 5: Solve for x
    x = 871,489,452.48/31,114.40
  6. Step 6: Final answer
    x = 28,009.20

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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.