Home / 12,721.02-19,077.89-4,286.61

Finding the Fourth Proportional to 12,721.02, 19,077.89 and 4,286.61

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Solution

The fourth proportional to 12,721.02, 19,077.89 and 4,286.61 is: 6,428.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,721.02 : 19,077.89 = 4,286.61 : x
  2. Step 2: Convert to fraction form
    12,721.02/19,077.89 = 4,286.61/x
  3. Step 3: Cross multiply
    12,721.02x = 19,077.89 × 4,286.61
  4. Step 4: Simplify right side
    12,721.02x = 81,779,367.95
  5. Step 5: Solve for x
    x = 81,779,367.95/12,721.02
  6. Step 6: Final answer
    x = 6,428.68

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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.