Home / 12,955.85-17,887.79-9,781.97

Finding the Fourth Proportional to 12,955.85, 17,887.79 and 9,781.97

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Solution

The fourth proportional to 12,955.85, 17,887.79 and 9,781.97 is: 13,505.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,955.85 : 17,887.79 = 9,781.97 : x
  2. Step 2: Convert to fraction form
    12,955.85/17,887.79 = 9,781.97/x
  3. Step 3: Cross multiply
    12,955.85x = 17,887.79 × 9,781.97
  4. Step 4: Simplify right side
    12,955.85x = 174,977,705.14
  5. Step 5: Solve for x
    x = 174,977,705.14/12,955.85
  6. Step 6: Final answer
    x = 13,505.69

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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.