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Finding the Fourth Proportional to 19,138.10, 28,713.22 and 6,657.62

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Solution

The fourth proportional to 19,138.10, 28,713.22 and 6,657.62 is: 9,988.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,138.10 : 28,713.22 = 6,657.62 : x
  2. Step 2: Convert to fraction form
    19,138.10/28,713.22 = 6,657.62/x
  3. Step 3: Cross multiply
    19,138.10x = 28,713.22 × 6,657.62
  4. Step 4: Simplify right side
    19,138.10x = 191,161,707.74
  5. Step 5: Solve for x
    x = 191,161,707.74/19,138.10
  6. Step 6: Final answer
    x = 9,988.54

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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.