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Finding the Fourth Proportional to 56,239.76, 84,365.40 and 21,208.88

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Solution

The fourth proportional to 56,239.76, 84,365.40 and 21,208.88 is: 31,815.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,239.76 : 84,365.40 = 21,208.88 : x
  2. Step 2: Convert to fraction form
    56,239.76/84,365.40 = 21,208.88/x
  3. Step 3: Cross multiply
    56,239.76x = 84,365.40 × 21,208.88
  4. Step 4: Simplify right side
    56,239.76x = 1,789,295,644.75
  5. Step 5: Solve for x
    x = 1,789,295,644.75/56,239.76
  6. Step 6: Final answer
    x = 31,815.49

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1.5x scale

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.