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Finding the Fourth Proportional to 56,297.88, 84,359.28 and 21,218.40

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Solution

The fourth proportional to 56,297.88, 84,359.28 and 21,218.40 is: 31,794.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,297.88 : 84,359.28 = 21,218.40 : x
  2. Step 2: Convert to fraction form
    56,297.88/84,359.28 = 21,218.40/x
  3. Step 3: Cross multiply
    56,297.88x = 84,359.28 × 21,218.40
  4. Step 4: Simplify right side
    56,297.88x = 1,789,968,946.75
  5. Step 5: Solve for x
    x = 1,789,968,946.75/56,297.88
  6. Step 6: Final answer
    x = 31,794.61

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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.