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Finding the Fourth Proportional to 18,751.96, 28,127.94 and 7,655.68

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Solution

The fourth proportional to 18,751.96, 28,127.94 and 7,655.68 is: 11,483.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,751.96 : 28,127.94 = 7,655.68 : x
  2. Step 2: Convert to fraction form
    18,751.96/28,127.94 = 7,655.68/x
  3. Step 3: Cross multiply
    18,751.96x = 28,127.94 × 7,655.68
  4. Step 4: Simplify right side
    18,751.96x = 215,338,507.70
  5. Step 5: Solve for x
    x = 215,338,507.70/18,751.96
  6. Step 6: Final answer
    x = 11,483.52

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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.