Home / 12,128.54-18,188.94-4,731.20

Finding the Fourth Proportional to 12,128.54, 18,188.94 and 4,731.20

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Solution

The fourth proportional to 12,128.54, 18,188.94 and 4,731.20 is: 7,095.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,128.54 : 18,188.94 = 4,731.20 : x
  2. Step 2: Convert to fraction form
    12,128.54/18,188.94 = 4,731.20/x
  3. Step 3: Cross multiply
    12,128.54x = 18,188.94 × 4,731.20
  4. Step 4: Simplify right side
    12,128.54x = 86,055,512.93
  5. Step 5: Solve for x
    x = 86,055,512.93/12,128.54
  6. Step 6: Final answer
    x = 7,095.29

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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.