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Finding the Fourth Proportional to 19,872.76, 29,797.62 and 8,172.76

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Solution

The fourth proportional to 19,872.76, 29,797.62 and 8,172.76 is: 12,254.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,872.76 : 29,797.62 = 8,172.76 : x
  2. Step 2: Convert to fraction form
    19,872.76/29,797.62 = 8,172.76/x
  3. Step 3: Cross multiply
    19,872.76x = 29,797.62 × 8,172.76
  4. Step 4: Simplify right side
    19,872.76x = 243,528,796.83
  5. Step 5: Solve for x
    x = 243,528,796.83/19,872.76
  6. Step 6: Final answer
    x = 12,254.40

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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.