Home / 19,917.60-29,890.80-8,239.20

Finding the Fourth Proportional to 19,917.60, 29,890.80 and 8,239.20

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Solution

The fourth proportional to 19,917.60, 29,890.80 and 8,239.20 is: 12,364.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,917.60 : 29,890.80 = 8,239.20 : x
  2. Step 2: Convert to fraction form
    19,917.60/29,890.80 = 8,239.20/x
  3. Step 3: Cross multiply
    19,917.60x = 29,890.80 × 8,239.20
  4. Step 4: Simplify right side
    19,917.60x = 246,276,279.36
  5. Step 5: Solve for x
    x = 246,276,279.36/19,917.60
  6. Step 6: Final answer
    x = 12,364.76

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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.