Home / 12,091.90-18,137.56-7,125.77

Finding the Fourth Proportional to 12,091.90, 18,137.56 and 7,125.77

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Solution

The fourth proportional to 12,091.90, 18,137.56 and 7,125.77 is: 10,688.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,091.90 : 18,137.56 = 7,125.77 : x
  2. Step 2: Convert to fraction form
    12,091.90/18,137.56 = 7,125.77/x
  3. Step 3: Cross multiply
    12,091.90x = 18,137.56 × 7,125.77
  4. Step 4: Simplify right side
    12,091.90x = 129,244,080.92
  5. Step 5: Solve for x
    x = 129,244,080.92/12,091.90
  6. Step 6: Final answer
    x = 10,688.48

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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.