Home / 20,389.89-28,193.55-17,765.49

Finding the Fourth Proportional to 20,389.89, 28,193.55 and 17,765.49

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Solution

The fourth proportional to 20,389.89, 28,193.55 and 17,765.49 is: 24,564.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,389.89 : 28,193.55 = 17,765.49 : x
  2. Step 2: Convert to fraction form
    20,389.89/28,193.55 = 17,765.49/x
  3. Step 3: Cross multiply
    20,389.89x = 28,193.55 × 17,765.49
  4. Step 4: Simplify right side
    20,389.89x = 500,872,230.59
  5. Step 5: Solve for x
    x = 500,872,230.59/20,389.89
  6. Step 6: Final answer
    x = 24,564.73

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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.