Home / 12,815.05-19,221.63-6,156.31

Finding the Fourth Proportional to 12,815.05, 19,221.63 and 6,156.31

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Solution

The fourth proportional to 12,815.05, 19,221.63 and 6,156.31 is: 9,234.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,815.05 : 19,221.63 = 6,156.31 : x
  2. Step 2: Convert to fraction form
    12,815.05/19,221.63 = 6,156.31/x
  3. Step 3: Cross multiply
    12,815.05x = 19,221.63 × 6,156.31
  4. Step 4: Simplify right side
    12,815.05x = 118,334,241.85
  5. Step 5: Solve for x
    x = 118,334,241.85/12,815.05
  6. Step 6: Final answer
    x = 9,234.01

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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.