Home / 43,218.88-64,830.38-21,005.80

Finding the Fourth Proportional to 43,218.88, 64,830.38 and 21,005.80

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Solution

The fourth proportional to 43,218.88, 64,830.38 and 21,005.80 is: 31,509.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,218.88 : 64,830.38 = 21,005.80 : x
  2. Step 2: Convert to fraction form
    43,218.88/64,830.38 = 21,005.80/x
  3. Step 3: Cross multiply
    43,218.88x = 64,830.38 × 21,005.80
  4. Step 4: Simplify right side
    43,218.88x = 1,361,813,996.20
  5. Step 5: Solve for x
    x = 1,361,813,996.20/43,218.88
  6. Step 6: Final answer
    x = 31,509.70

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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.