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Finding the Fourth Proportional to 12,997.80, 17,937.01 and 7,029.51

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Solution

The fourth proportional to 12,997.80, 17,937.01 and 7,029.51 is: 9,700.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,997.80 : 17,937.01 = 7,029.51 : x
  2. Step 2: Convert to fraction form
    12,997.80/17,937.01 = 7,029.51/x
  3. Step 3: Cross multiply
    12,997.80x = 17,937.01 × 7,029.51
  4. Step 4: Simplify right side
    12,997.80x = 126,088,391.17
  5. Step 5: Solve for x
    x = 126,088,391.17/12,997.80
  6. Step 6: Final answer
    x = 9,700.75

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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.