Home / 13,146.12-18,141.30-7,178.04

Finding the Fourth Proportional to 13,146.12, 18,141.30 and 7,178.04

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Solution

The fourth proportional to 13,146.12, 18,141.30 and 7,178.04 is: 9,905.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,146.12 : 18,141.30 = 7,178.04 : x
  2. Step 2: Convert to fraction form
    13,146.12/18,141.30 = 7,178.04/x
  3. Step 3: Cross multiply
    13,146.12x = 18,141.30 × 7,178.04
  4. Step 4: Simplify right side
    13,146.12x = 130,218,977.05
  5. Step 5: Solve for x
    x = 130,218,977.05/13,146.12
  6. Step 6: Final answer
    x = 9,905.51

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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.