Home / 12,159.40-18,231.80-4,755.03

Finding the Fourth Proportional to 12,159.40, 18,231.80 and 4,755.03

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Solution

The fourth proportional to 12,159.40, 18,231.80 and 4,755.03 is: 7,129.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,159.40 : 18,231.80 = 4,755.03 : x
  2. Step 2: Convert to fraction form
    12,159.40/18,231.80 = 4,755.03/x
  3. Step 3: Cross multiply
    12,159.40x = 18,231.80 × 4,755.03
  4. Step 4: Simplify right side
    12,159.40x = 86,692,755.95
  5. Step 5: Solve for x
    x = 86,692,755.95/12,159.40
  6. Step 6: Final answer
    x = 7,129.69

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.