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Finding the Fourth Proportional to 38,401.80, 57,610.80 and 12,109.20

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Solution

The fourth proportional to 38,401.80, 57,610.80 and 12,109.20 is: 18,166.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,401.80 : 57,610.80 = 12,109.20 : x
  2. Step 2: Convert to fraction form
    38,401.80/57,610.80 = 12,109.20/x
  3. Step 3: Cross multiply
    38,401.80x = 57,610.80 × 12,109.20
  4. Step 4: Simplify right side
    38,401.80x = 697,620,699.36
  5. Step 5: Solve for x
    x = 697,620,699.36/38,401.80
  6. Step 6: Final answer
    x = 18,166.35

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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.