Home / 12,118.28-18,172.76-4,721.77

Finding the Fourth Proportional to 12,118.28, 18,172.76 and 4,721.77

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Solution

The fourth proportional to 12,118.28, 18,172.76 and 4,721.77 is: 7,080.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,118.28 : 18,172.76 = 4,721.77 : x
  2. Step 2: Convert to fraction form
    12,118.28/18,172.76 = 4,721.77/x
  3. Step 3: Cross multiply
    12,118.28x = 18,172.76 × 4,721.77
  4. Step 4: Simplify right side
    12,118.28x = 85,807,478.51
  5. Step 5: Solve for x
    x = 85,807,478.51/12,118.28
  6. Step 6: Final answer
    x = 7,080.83

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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.