Home / 12,612.91-18,920.72-4,291.37

Finding the Fourth Proportional to 12,612.91, 18,920.72 and 4,291.37

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Solution

The fourth proportional to 12,612.91, 18,920.72 and 4,291.37 is: 6,437.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,612.91 : 18,920.72 = 4,291.37 : x
  2. Step 2: Convert to fraction form
    12,612.91/18,920.72 = 4,291.37/x
  3. Step 3: Cross multiply
    12,612.91x = 18,920.72 × 4,291.37
  4. Step 4: Simplify right side
    12,612.91x = 81,195,868.22
  5. Step 5: Solve for x
    x = 81,195,868.22/12,612.91
  6. Step 6: Final answer
    x = 6,437.52

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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.