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Finding the Fourth Proportional to 15,070, 20,796.80 and 8,697.92

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Solution

The fourth proportional to 15,070, 20,796.80 and 8,697.92 is: 12,003.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,070 : 20,796.80 = 8,697.92 : x
  2. Step 2: Convert to fraction form
    15,070/20,796.80 = 8,697.92/x
  3. Step 3: Cross multiply
    15,070x = 20,796.80 × 8,697.92
  4. Step 4: Simplify right side
    15,070x = 180,888,902.66
  5. Step 5: Solve for x
    x = 180,888,902.66/15,070
  6. Step 6: Final answer
    x = 12,003.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.