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Finding the Fourth Proportional to 7,187.24, 9,918.30 and 4,000.47

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Solution

The fourth proportional to 7,187.24, 9,918.30 and 4,000.47 is: 5,520.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,187.24 : 9,918.30 = 4,000.47 : x
  2. Step 2: Convert to fraction form
    7,187.24/9,918.30 = 4,000.47/x
  3. Step 3: Cross multiply
    7,187.24x = 9,918.30 × 4,000.47
  4. Step 4: Simplify right side
    7,187.24x = 39,677,898.79
  5. Step 5: Solve for x
    x = 39,677,898.79/7,187.24
  6. Step 6: Final answer
    x = 5,520.61

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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.