Home / 15,494.72-21,382.70-9,121.50

Finding the Fourth Proportional to 15,494.72, 21,382.70 and 9,121.50

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Solution

The fourth proportional to 15,494.72, 21,382.70 and 9,121.50 is: 12,587.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,494.72 : 21,382.70 = 9,121.50 : x
  2. Step 2: Convert to fraction form
    15,494.72/21,382.70 = 9,121.50/x
  3. Step 3: Cross multiply
    15,494.72x = 21,382.70 × 9,121.50
  4. Step 4: Simplify right side
    15,494.72x = 195,042,252.44
  5. Step 5: Solve for x
    x = 195,042,252.44/15,494.72
  6. Step 6: Final answer
    x = 12,587.66

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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.