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Finding the Fourth Proportional to 9,920.47, 14,872.91 and 6,790.99

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Solution

The fourth proportional to 9,920.47, 14,872.91 and 6,790.99 is: 10,181.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,920.47 : 14,872.91 = 6,790.99 : x
  2. Step 2: Convert to fraction form
    9,920.47/14,872.91 = 6,790.99/x
  3. Step 3: Cross multiply
    9,920.47x = 14,872.91 × 6,790.99
  4. Step 4: Simplify right side
    9,920.47x = 101,001,767.72
  5. Step 5: Solve for x
    x = 101,001,767.72/9,920.47
  6. Step 6: Final answer
    x = 10,181.15

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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.