Home / 12,120.89-18,192.29-5,106.11

Finding the Fourth Proportional to 12,120.89, 18,192.29 and 5,106.11

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Solution

The fourth proportional to 12,120.89, 18,192.29 and 5,106.11 is: 7,663.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,120.89 : 18,192.29 = 5,106.11 : x
  2. Step 2: Convert to fraction form
    12,120.89/18,192.29 = 5,106.11/x
  3. Step 3: Cross multiply
    12,120.89x = 18,192.29 × 5,106.11
  4. Step 4: Simplify right side
    12,120.89x = 92,891,717.40
  5. Step 5: Solve for x
    x = 92,891,717.40/12,120.89
  6. Step 6: Final answer
    x = 7,663.77

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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.