Home / 12,640.46-17,442.65-12,215.81

Finding the Fourth Proportional to 12,640.46, 17,442.65 and 12,215.81

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Solution

The fourth proportional to 12,640.46, 17,442.65 and 12,215.81 is: 16,856.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,640.46 : 17,442.65 = 12,215.81 : x
  2. Step 2: Convert to fraction form
    12,640.46/17,442.65 = 12,215.81/x
  3. Step 3: Cross multiply
    12,640.46x = 17,442.65 × 12,215.81
  4. Step 4: Simplify right side
    12,640.46x = 213,076,172.44
  5. Step 5: Solve for x
    x = 213,076,172.44/12,640.46
  6. Step 6: Final answer
    x = 16,856.69

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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.