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Finding the Fourth Proportional to 19,807.12, 29,712.12 and 8,121.04

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Solution

The fourth proportional to 19,807.12, 29,712.12 and 8,121.04 is: 12,182.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,807.12 : 29,712.12 = 8,121.04 : x
  2. Step 2: Convert to fraction form
    19,807.12/29,712.12 = 8,121.04/x
  3. Step 3: Cross multiply
    19,807.12x = 29,712.12 × 8,121.04
  4. Step 4: Simplify right side
    19,807.12x = 241,293,315.00
  5. Step 5: Solve for x
    x = 241,293,315.00/19,807.12
  6. Step 6: Final answer
    x = 12,182.15

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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.