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Finding the Fourth Proportional to 28,982.10, 39,990.03 and 17,047.80

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Solution

The fourth proportional to 28,982.10, 39,990.03 and 17,047.80 is: 23,522.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,982.10 : 39,990.03 = 17,047.80 : x
  2. Step 2: Convert to fraction form
    28,982.10/39,990.03 = 17,047.80/x
  3. Step 3: Cross multiply
    28,982.10x = 39,990.03 × 17,047.80
  4. Step 4: Simplify right side
    28,982.10x = 681,742,033.43
  5. Step 5: Solve for x
    x = 681,742,033.43/28,982.10
  6. Step 6: Final answer
    x = 23,522.87

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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.