Home / 13,146.11-18,141.88-7,178.01

Finding the Fourth Proportional to 13,146.11, 18,141.88 and 7,178.01

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Solution

The fourth proportional to 13,146.11, 18,141.88 and 7,178.01 is: 9,905.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,146.11 : 18,141.88 = 7,178.01 : x
  2. Step 2: Convert to fraction form
    13,146.11/18,141.88 = 7,178.01/x
  3. Step 3: Cross multiply
    13,146.11x = 18,141.88 × 7,178.01
  4. Step 4: Simplify right side
    13,146.11x = 130,222,578.11
  5. Step 5: Solve for x
    x = 130,222,578.11/13,146.11
  6. Step 6: Final answer
    x = 9,905.79

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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.