Home / 13,141.11-18,134.60-7,172.72

Finding the Fourth Proportional to 13,141.11, 18,134.60 and 7,172.72

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Solution

The fourth proportional to 13,141.11, 18,134.60 and 7,172.72 is: 9,898.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,141.11 : 18,134.60 = 7,172.72 : x
  2. Step 2: Convert to fraction form
    13,141.11/18,134.60 = 7,172.72/x
  3. Step 3: Cross multiply
    13,141.11x = 18,134.60 × 7,172.72
  4. Step 4: Simplify right side
    13,141.11x = 130,074,408.11
  5. Step 5: Solve for x
    x = 130,074,408.11/13,141.11
  6. Step 6: Final answer
    x = 9,898.28

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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.