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Finding the Fourth Proportional to 7,988.95, 11,989.10 and 3,610.09

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Solution

The fourth proportional to 7,988.95, 11,989.10 and 3,610.09 is: 5,417.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,988.95 : 11,989.10 = 3,610.09 : x
  2. Step 2: Convert to fraction form
    7,988.95/11,989.10 = 3,610.09/x
  3. Step 3: Cross multiply
    7,988.95x = 11,989.10 × 3,610.09
  4. Step 4: Simplify right side
    7,988.95x = 43,281,730.02
  5. Step 5: Solve for x
    x = 43,281,730.02/7,988.95
  6. Step 6: Final answer
    x = 5,417.70

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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.