Home / 20,644.26-28,490.49-12,580.98

Finding the Fourth Proportional to 20,644.26, 28,490.49 and 12,580.98

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Solution

The fourth proportional to 20,644.26, 28,490.49 and 12,580.98 is: 17,362.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,644.26 : 28,490.49 = 12,580.98 : x
  2. Step 2: Convert to fraction form
    20,644.26/28,490.49 = 12,580.98/x
  3. Step 3: Cross multiply
    20,644.26x = 28,490.49 × 12,580.98
  4. Step 4: Simplify right side
    20,644.26x = 358,438,284.88
  5. Step 5: Solve for x
    x = 358,438,284.88/20,644.26
  6. Step 6: Final answer
    x = 17,362.61

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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.