Home / 14,185.31-19,578.10-8,220.61

Finding the Fourth Proportional to 14,185.31, 19,578.10 and 8,220.61

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Solution

The fourth proportional to 14,185.31, 19,578.10 and 8,220.61 is: 11,345.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,185.31 : 19,578.10 = 8,220.61 : x
  2. Step 2: Convert to fraction form
    14,185.31/19,578.10 = 8,220.61/x
  3. Step 3: Cross multiply
    14,185.31x = 19,578.10 × 8,220.61
  4. Step 4: Simplify right side
    14,185.31x = 160,943,826.75
  5. Step 5: Solve for x
    x = 160,943,826.75/14,185.31
  6. Step 6: Final answer
    x = 11,345.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.