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Finding the Fourth Proportional to 12,755.98, 17,603.49 and 7,091.20

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Solution

The fourth proportional to 12,755.98, 17,603.49 and 7,091.20 is: 9,785.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,755.98 : 17,603.49 = 7,091.20 : x
  2. Step 2: Convert to fraction form
    12,755.98/17,603.49 = 7,091.20/x
  3. Step 3: Cross multiply
    12,755.98x = 17,603.49 × 7,091.20
  4. Step 4: Simplify right side
    12,755.98x = 124,829,868.29
  5. Step 5: Solve for x
    x = 124,829,868.29/12,755.98
  6. Step 6: Final answer
    x = 9,785.99

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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.