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Finding the Fourth Proportional to 7,187.47, 9,918.55 and 4,000.62

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Solution

The fourth proportional to 7,187.47, 9,918.55 and 4,000.62 is: 5,520.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,187.47 : 9,918.55 = 4,000.62 : x
  2. Step 2: Convert to fraction form
    7,187.47/9,918.55 = 4,000.62/x
  3. Step 3: Cross multiply
    7,187.47x = 9,918.55 × 4,000.62
  4. Step 4: Simplify right side
    7,187.47x = 39,680,339.50
  5. Step 5: Solve for x
    x = 39,680,339.50/7,187.47
  6. Step 6: Final answer
    x = 5,520.77

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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.