Home / 13,146.48-18,141.80-7,178.24

Finding the Fourth Proportional to 13,146.48, 18,141.80 and 7,178.24

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Solution

The fourth proportional to 13,146.48, 18,141.80 and 7,178.24 is: 9,905.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,146.48 : 18,141.80 = 7,178.24 : x
  2. Step 2: Convert to fraction form
    13,146.48/18,141.80 = 7,178.24/x
  3. Step 3: Cross multiply
    13,146.48x = 18,141.80 × 7,178.24
  4. Step 4: Simplify right side
    13,146.48x = 130,226,194.43
  5. Step 5: Solve for x
    x = 130,226,194.43/13,146.48
  6. Step 6: Final answer
    x = 9,905.78

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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.