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Finding the Fourth Proportional to 28,731.70, 43,101.60 and 9,008.20

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Solution

The fourth proportional to 28,731.70, 43,101.60 and 9,008.20 is: 13,513.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,731.70 : 43,101.60 = 9,008.20 : x
  2. Step 2: Convert to fraction form
    28,731.70/43,101.60 = 9,008.20/x
  3. Step 3: Cross multiply
    28,731.70x = 43,101.60 × 9,008.20
  4. Step 4: Simplify right side
    28,731.70x = 388,267,833.12
  5. Step 5: Solve for x
    x = 388,267,833.12/28,731.70
  6. Step 6: Final answer
    x = 13,513.57

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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.