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Finding the Fourth Proportional to 31,102.80, 46,654.20 and 28,672.80

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Solution

The fourth proportional to 31,102.80, 46,654.20 and 28,672.80 is: 43,009.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,102.80 : 46,654.20 = 28,672.80 : x
  2. Step 2: Convert to fraction form
    31,102.80/46,654.20 = 28,672.80/x
  3. Step 3: Cross multiply
    31,102.80x = 46,654.20 × 28,672.80
  4. Step 4: Simplify right side
    31,102.80x = 1,337,706,545.76
  5. Step 5: Solve for x
    x = 1,337,706,545.76/31,102.80
  6. Step 6: Final answer
    x = 43,009.20

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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.