Home / 56,784.80-85,174.32-21,721.76

Finding the Fourth Proportional to 56,784.80, 85,174.32 and 21,721.76

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Solution

The fourth proportional to 56,784.80, 85,174.32 and 21,721.76 is: 32,581.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,784.80 : 85,174.32 = 21,721.76 : x
  2. Step 2: Convert to fraction form
    56,784.80/85,174.32 = 21,721.76/x
  3. Step 3: Cross multiply
    56,784.80x = 85,174.32 × 21,721.76
  4. Step 4: Simplify right side
    56,784.80x = 1,850,136,137.20
  5. Step 5: Solve for x
    x = 1,850,136,137.20/56,784.80
  6. Step 6: Final answer
    x = 32,581.54

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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.