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Finding the Fourth Proportional to 19,967.31, 29,947.05 and 6,638.22

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Solution

The fourth proportional to 19,967.31, 29,947.05 and 6,638.22 is: 9,956.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,967.31 : 29,947.05 = 6,638.22 : x
  2. Step 2: Convert to fraction form
    19,967.31/29,947.05 = 6,638.22/x
  3. Step 3: Cross multiply
    19,967.31x = 29,947.05 × 6,638.22
  4. Step 4: Simplify right side
    19,967.31x = 198,795,106.25
  5. Step 5: Solve for x
    x = 198,795,106.25/19,967.31
  6. Step 6: Final answer
    x = 9,956.03

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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.