Home / 19,772.20-29,643.90-8,079.40

Finding the Fourth Proportional to 19,772.20, 29,643.90 and 8,079.40

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Solution

The fourth proportional to 19,772.20, 29,643.90 and 8,079.40 is: 12,113.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,772.20 : 29,643.90 = 8,079.40 : x
  2. Step 2: Convert to fraction form
    19,772.20/29,643.90 = 8,079.40/x
  3. Step 3: Cross multiply
    19,772.20x = 29,643.90 × 8,079.40
  4. Step 4: Simplify right side
    19,772.20x = 239,504,925.66
  5. Step 5: Solve for x
    x = 239,504,925.66/19,772.20
  6. Step 6: Final answer
    x = 12,113.22

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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.