Home / 12,135.83-18,203.82-4,238.31

Finding the Fourth Proportional to 12,135.83, 18,203.82 and 4,238.31

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Solution

The fourth proportional to 12,135.83, 18,203.82 and 4,238.31 is: 6,357.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,135.83 : 18,203.82 = 4,238.31 : x
  2. Step 2: Convert to fraction form
    12,135.83/18,203.82 = 4,238.31/x
  3. Step 3: Cross multiply
    12,135.83x = 18,203.82 × 4,238.31
  4. Step 4: Simplify right side
    12,135.83x = 77,153,432.34
  5. Step 5: Solve for x
    x = 77,153,432.34/12,135.83
  6. Step 6: Final answer
    x = 6,357.49

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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.