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Finding the Fourth Proportional to 19,861.88, 29,792.81 and 7,385.04

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Solution

The fourth proportional to 19,861.88, 29,792.81 and 7,385.04 is: 11,077.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,861.88 : 29,792.81 = 7,385.04 : x
  2. Step 2: Convert to fraction form
    19,861.88/29,792.81 = 7,385.04/x
  3. Step 3: Cross multiply
    19,861.88x = 29,792.81 × 7,385.04
  4. Step 4: Simplify right side
    19,861.88x = 220,021,112.03
  5. Step 5: Solve for x
    x = 220,021,112.03/19,861.88
  6. Step 6: Final answer
    x = 11,077.56

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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.