Home / 28,644.86-39,549.18-21,918.48

Finding the Fourth Proportional to 28,644.86, 39,549.18 and 21,918.48

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Solution

The fourth proportional to 28,644.86, 39,549.18 and 21,918.48 is: 30,262.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,644.86 : 39,549.18 = 21,918.48 : x
  2. Step 2: Convert to fraction form
    28,644.86/39,549.18 = 21,918.48/x
  3. Step 3: Cross multiply
    28,644.86x = 39,549.18 × 21,918.48
  4. Step 4: Simplify right side
    28,644.86x = 866,857,910.85
  5. Step 5: Solve for x
    x = 866,857,910.85/28,644.86
  6. Step 6: Final answer
    x = 30,262.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.