Home / 19,790.20-29,680.50-6,639.16

Finding the Fourth Proportional to 19,790.20, 29,680.50 and 6,639.16

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Solution

The fourth proportional to 19,790.20, 29,680.50 and 6,639.16 is: 9,957.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,790.20 : 29,680.50 = 6,639.16 : x
  2. Step 2: Convert to fraction form
    19,790.20/29,680.50 = 6,639.16/x
  3. Step 3: Cross multiply
    19,790.20x = 29,680.50 × 6,639.16
  4. Step 4: Simplify right side
    19,790.20x = 197,053,588.38
  5. Step 5: Solve for x
    x = 197,053,588.38/19,790.20
  6. Step 6: Final answer
    x = 9,957.13

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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.