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Finding the Fourth Proportional to 28,707.12, 43,060.68 and 7,930.08

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Solution

The fourth proportional to 28,707.12, 43,060.68 and 7,930.08 is: 11,895.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,707.12 : 43,060.68 = 7,930.08 : x
  2. Step 2: Convert to fraction form
    28,707.12/43,060.68 = 7,930.08/x
  3. Step 3: Cross multiply
    28,707.12x = 43,060.68 × 7,930.08
  4. Step 4: Simplify right side
    28,707.12x = 341,474,637.25
  5. Step 5: Solve for x
    x = 341,474,637.25/28,707.12
  6. Step 6: Final answer
    x = 11,895.12

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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.