Home / 13,141.22-18,134.78-7,172.87

Finding the Fourth Proportional to 13,141.22, 18,134.78 and 7,172.87

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Solution

The fourth proportional to 13,141.22, 18,134.78 and 7,172.87 is: 9,898.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,141.22 : 18,134.78 = 7,172.87 : x
  2. Step 2: Convert to fraction form
    13,141.22/18,134.78 = 7,172.87/x
  3. Step 3: Cross multiply
    13,141.22x = 18,134.78 × 7,172.87
  4. Step 4: Simplify right side
    13,141.22x = 130,078,292.88
  5. Step 5: Solve for x
    x = 130,078,292.88/13,141.22
  6. Step 6: Final answer
    x = 9,898.50

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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.