Home / 39,210.62-54,109.98-21,305.90

Finding the Fourth Proportional to 39,210.62, 54,109.98 and 21,305.90

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Solution

The fourth proportional to 39,210.62, 54,109.98 and 21,305.90 is: 29,401.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,210.62 : 54,109.98 = 21,305.90 : x
  2. Step 2: Convert to fraction form
    39,210.62/54,109.98 = 21,305.90/x
  3. Step 3: Cross multiply
    39,210.62x = 54,109.98 × 21,305.90
  4. Step 4: Simplify right side
    39,210.62x = 1,152,861,822.88
  5. Step 5: Solve for x
    x = 1,152,861,822.88/39,210.62
  6. Step 6: Final answer
    x = 29,401.77

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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.