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Finding the Fourth Proportional to 56,640.52, 84,962.04 and 20,615.80

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Solution

The fourth proportional to 56,640.52, 84,962.04 and 20,615.80 is: 30,924.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,640.52 : 84,962.04 = 20,615.80 : x
  2. Step 2: Convert to fraction form
    56,640.52/84,962.04 = 20,615.80/x
  3. Step 3: Cross multiply
    56,640.52x = 84,962.04 × 20,615.80
  4. Step 4: Simplify right side
    56,640.52x = 1,751,560,424.23
  5. Step 5: Solve for x
    x = 1,751,560,424.23/56,640.52
  6. Step 6: Final answer
    x = 30,924.16

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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.