Home / 12,012.51-18,018.77-3,127.82

Finding the Fourth Proportional to 12,012.51, 18,018.77 and 3,127.82

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Solution

The fourth proportional to 12,012.51, 18,018.77 and 3,127.82 is: 4,691.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,012.51 : 18,018.77 = 3,127.82 : x
  2. Step 2: Convert to fraction form
    12,012.51/18,018.77 = 3,127.82/x
  3. Step 3: Cross multiply
    12,012.51x = 18,018.77 × 3,127.82
  4. Step 4: Simplify right side
    12,012.51x = 56,359,397.70
  5. Step 5: Solve for x
    x = 56,359,397.70/12,012.51
  6. Step 6: Final answer
    x = 4,691.72

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Similar ratio
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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.