Home / 12,085.20-18,108.36-7,458.48

Finding the Fourth Proportional to 12,085.20, 18,108.36 and 7,458.48

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Solution

The fourth proportional to 12,085.20, 18,108.36 and 7,458.48 is: 11,175.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,085.20 : 18,108.36 = 7,458.48 : x
  2. Step 2: Convert to fraction form
    12,085.20/18,108.36 = 7,458.48/x
  3. Step 3: Cross multiply
    12,085.20x = 18,108.36 × 7,458.48
  4. Step 4: Simplify right side
    12,085.20x = 135,060,840.89
  5. Step 5: Solve for x
    x = 135,060,840.89/12,085.20
  6. Step 6: Final answer
    x = 11,175.72

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1.5x scale

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.