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Finding the Fourth Proportional to 7,187.07, 9,917.58 and 4,000.11

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Solution

The fourth proportional to 7,187.07, 9,917.58 and 4,000.11 is: 5,519.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,187.07 : 9,917.58 = 4,000.11 : x
  2. Step 2: Convert to fraction form
    7,187.07/9,917.58 = 4,000.11/x
  3. Step 3: Cross multiply
    7,187.07x = 9,917.58 × 4,000.11
  4. Step 4: Simplify right side
    7,187.07x = 39,671,410.93
  5. Step 5: Solve for x
    x = 39,671,410.93/7,187.07
  6. Step 6: Final answer
    x = 5,519.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.