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Finding the Fourth Proportional to 18,735.88, 28,104.66 and 7,048.20

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Solution

The fourth proportional to 18,735.88, 28,104.66 and 7,048.20 is: 10,572.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,735.88 : 28,104.66 = 7,048.20 : x
  2. Step 2: Convert to fraction form
    18,735.88/28,104.66 = 7,048.20/x
  3. Step 3: Cross multiply
    18,735.88x = 28,104.66 × 7,048.20
  4. Step 4: Simplify right side
    18,735.88x = 198,087,264.61
  5. Step 5: Solve for x
    x = 198,087,264.61/18,735.88
  6. Step 6: Final answer
    x = 10,572.62

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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.