Home / 12,129.40-18,188.70-5,557.60

Finding the Fourth Proportional to 12,129.40, 18,188.70 and 5,557.60

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Solution

The fourth proportional to 12,129.40, 18,188.70 and 5,557.60 is: 8,333.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,129.40 : 18,188.70 = 5,557.60 : x
  2. Step 2: Convert to fraction form
    12,129.40/18,188.70 = 5,557.60/x
  3. Step 3: Cross multiply
    12,129.40x = 18,188.70 × 5,557.60
  4. Step 4: Simplify right side
    12,129.40x = 101,085,519.12
  5. Step 5: Solve for x
    x = 101,085,519.12/12,129.40
  6. Step 6: Final answer
    x = 8,333.93

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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.