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Finding the Fourth Proportional to 18,751.93, 28,127.90 and 7,656.14

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Solution

The fourth proportional to 18,751.93, 28,127.90 and 7,656.14 is: 11,484.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,751.93 : 28,127.90 = 7,656.14 : x
  2. Step 2: Convert to fraction form
    18,751.93/28,127.90 = 7,656.14/x
  3. Step 3: Cross multiply
    18,751.93x = 28,127.90 × 7,656.14
  4. Step 4: Simplify right side
    18,751.93x = 215,351,229.77
  5. Step 5: Solve for x
    x = 215,351,229.77/18,751.93
  6. Step 6: Final answer
    x = 11,484.22

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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.