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Finding the Fourth Proportional to 19,812.82, 29,712.35 and 7,963.08

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Solution

The fourth proportional to 19,812.82, 29,712.35 and 7,963.08 is: 11,941.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,812.82 : 29,712.35 = 7,963.08 : x
  2. Step 2: Convert to fraction form
    19,812.82/29,712.35 = 7,963.08/x
  3. Step 3: Cross multiply
    19,812.82x = 29,712.35 × 7,963.08
  4. Step 4: Simplify right side
    19,812.82x = 236,601,839.95
  5. Step 5: Solve for x
    x = 236,601,839.95/19,812.82
  6. Step 6: Final answer
    x = 11,941.86

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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.