Home / 12,420.72-17,140.65-6,755.49

Finding the Fourth Proportional to 12,420.72, 17,140.65 and 6,755.49

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Solution

The fourth proportional to 12,420.72, 17,140.65 and 6,755.49 is: 9,322.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,420.72 : 17,140.65 = 6,755.49 : x
  2. Step 2: Convert to fraction form
    12,420.72/17,140.65 = 6,755.49/x
  3. Step 3: Cross multiply
    12,420.72x = 17,140.65 × 6,755.49
  4. Step 4: Simplify right side
    12,420.72x = 115,793,489.67
  5. Step 5: Solve for x
    x = 115,793,489.67/12,420.72
  6. Step 6: Final answer
    x = 9,322.61

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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.