Home / 20,640.93-30,966.87-12,644.82

Finding the Fourth Proportional to 20,640.93, 30,966.87 and 12,644.82

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Solution

The fourth proportional to 20,640.93, 30,966.87 and 12,644.82 is: 18,970.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,640.93 : 30,966.87 = 12,644.82 : x
  2. Step 2: Convert to fraction form
    20,640.93/30,966.87 = 12,644.82/x
  3. Step 3: Cross multiply
    20,640.93x = 30,966.87 × 12,644.82
  4. Step 4: Simplify right side
    20,640.93x = 391,570,497.11
  5. Step 5: Solve for x
    x = 391,570,497.11/20,640.93
  6. Step 6: Final answer
    x = 18,970.58

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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.