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Finding the Fourth Proportional to 18,754.13, 28,137.68 and 7,070.69

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Solution

The fourth proportional to 18,754.13, 28,137.68 and 7,070.69 is: 10,608.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,754.13 : 28,137.68 = 7,070.69 : x
  2. Step 2: Convert to fraction form
    18,754.13/28,137.68 = 7,070.69/x
  3. Step 3: Cross multiply
    18,754.13x = 28,137.68 × 7,070.69
  4. Step 4: Simplify right side
    18,754.13x = 198,952,812.60
  5. Step 5: Solve for x
    x = 198,952,812.60/18,754.13
  6. Step 6: Final answer
    x = 10,608.48

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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.