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Finding the Fourth Proportional to 35,363.20, 53,047.20 and 11,991.40

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Solution

The fourth proportional to 35,363.20, 53,047.20 and 11,991.40 is: 17,987.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,363.20 : 53,047.20 = 11,991.40 : x
  2. Step 2: Convert to fraction form
    35,363.20/53,047.20 = 11,991.40/x
  3. Step 3: Cross multiply
    35,363.20x = 53,047.20 × 11,991.40
  4. Step 4: Simplify right side
    35,363.20x = 636,110,194.08
  5. Step 5: Solve for x
    x = 636,110,194.08/35,363.20
  6. Step 6: Final answer
    x = 17,987.91

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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.