Home / 12,102.30-18,152.80-3,781.36

Finding the Fourth Proportional to 12,102.30, 18,152.80 and 3,781.36

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Solution

The fourth proportional to 12,102.30, 18,152.80 and 3,781.36 is: 5,671.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,102.30 : 18,152.80 = 3,781.36 : x
  2. Step 2: Convert to fraction form
    12,102.30/18,152.80 = 3,781.36/x
  3. Step 3: Cross multiply
    12,102.30x = 18,152.80 × 3,781.36
  4. Step 4: Simplify right side
    12,102.30x = 68,642,271.81
  5. Step 5: Solve for x
    x = 68,642,271.81/12,102.30
  6. Step 6: Final answer
    x = 5,671.84

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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.