Home / 12,815.40-19,221.30-4,051.20

Finding the Fourth Proportional to 12,815.40, 19,221.30 and 4,051.20

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Solution

The fourth proportional to 12,815.40, 19,221.30 and 4,051.20 is: 6,076.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,815.40 : 19,221.30 = 4,051.20 : x
  2. Step 2: Convert to fraction form
    12,815.40/19,221.30 = 4,051.20/x
  3. Step 3: Cross multiply
    12,815.40x = 19,221.30 × 4,051.20
  4. Step 4: Simplify right side
    12,815.40x = 77,869,330.56
  5. Step 5: Solve for x
    x = 77,869,330.56/12,815.40
  6. Step 6: Final answer
    x = 6,076.23

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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.