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Finding the Fourth Proportional to 5,386.89, 8,087.12 and 5,137.62

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Solution

The fourth proportional to 5,386.89, 8,087.12 and 5,137.62 is: 7,712.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,386.89 : 8,087.12 = 5,137.62 : x
  2. Step 2: Convert to fraction form
    5,386.89/8,087.12 = 5,137.62/x
  3. Step 3: Cross multiply
    5,386.89x = 8,087.12 × 5,137.62
  4. Step 4: Simplify right side
    5,386.89x = 41,548,549.45
  5. Step 5: Solve for x
    x = 41,548,549.45/5,386.89
  6. Step 6: Final answer
    x = 7,712.90

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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.