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Finding the Fourth Proportional to 12,640.76, 17,442.93 and 7,334.55

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Solution

The fourth proportional to 12,640.76, 17,442.93 and 7,334.55 is: 10,120.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,640.76 : 17,442.93 = 7,334.55 : x
  2. Step 2: Convert to fraction form
    12,640.76/17,442.93 = 7,334.55/x
  3. Step 3: Cross multiply
    12,640.76x = 17,442.93 × 7,334.55
  4. Step 4: Simplify right side
    12,640.76x = 127,935,918.34
  5. Step 5: Solve for x
    x = 127,935,918.34/12,640.76
  6. Step 6: Final answer
    x = 10,120.91

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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.