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Finding the Fourth Proportional to 18,888.38, 28,345.43 and 7,795.02

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Solution

The fourth proportional to 18,888.38, 28,345.43 and 7,795.02 is: 11,697.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,888.38 : 28,345.43 = 7,795.02 : x
  2. Step 2: Convert to fraction form
    18,888.38/28,345.43 = 7,795.02/x
  3. Step 3: Cross multiply
    18,888.38x = 28,345.43 × 7,795.02
  4. Step 4: Simplify right side
    18,888.38x = 220,953,193.76
  5. Step 5: Solve for x
    x = 220,953,193.76/18,888.38
  6. Step 6: Final answer
    x = 11,697.84

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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.