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Finding the Fourth Proportional to 28,791, 39,744.90 and 20,300.04

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Solution

The fourth proportional to 28,791, 39,744.90 and 20,300.04 is: 28,023.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,791 : 39,744.90 = 20,300.04 : x
  2. Step 2: Convert to fraction form
    28,791/39,744.90 = 20,300.04/x
  3. Step 3: Cross multiply
    28,791x = 39,744.90 × 20,300.04
  4. Step 4: Simplify right side
    28,791x = 806,823,059.80
  5. Step 5: Solve for x
    x = 806,823,059.80/28,791
  6. Step 6: Final answer
    x = 28,023.45

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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.