Home / 12,755.09-17,602.40-7,720.22

Finding the Fourth Proportional to 12,755.09, 17,602.40 and 7,720.22

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Solution

The fourth proportional to 12,755.09, 17,602.40 and 7,720.22 is: 10,654.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,755.09 : 17,602.40 = 7,720.22 : x
  2. Step 2: Convert to fraction form
    12,755.09/17,602.40 = 7,720.22/x
  3. Step 3: Cross multiply
    12,755.09x = 17,602.40 × 7,720.22
  4. Step 4: Simplify right side
    12,755.09x = 135,894,400.53
  5. Step 5: Solve for x
    x = 135,894,400.53/12,755.09
  6. Step 6: Final answer
    x = 10,654.13

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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.