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Finding the Fourth Proportional to 28,649.76, 39,535.90 and 15,902.90

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Solution

The fourth proportional to 28,649.76, 39,535.90 and 15,902.90 is: 21,945.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,649.76 : 39,535.90 = 15,902.90 : x
  2. Step 2: Convert to fraction form
    28,649.76/39,535.90 = 15,902.90/x
  3. Step 3: Cross multiply
    28,649.76x = 39,535.90 × 15,902.90
  4. Step 4: Simplify right side
    28,649.76x = 628,735,464.11
  5. Step 5: Solve for x
    x = 628,735,464.11/28,649.76
  6. Step 6: Final answer
    x = 21,945.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.