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Finding the Fourth Proportional to 13,029.90, 17,978.13 and 7,726.02

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Solution

The fourth proportional to 13,029.90, 17,978.13 and 7,726.02 is: 10,660.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,029.90 : 17,978.13 = 7,726.02 : x
  2. Step 2: Convert to fraction form
    13,029.90/17,978.13 = 7,726.02/x
  3. Step 3: Cross multiply
    13,029.90x = 17,978.13 × 7,726.02
  4. Step 4: Simplify right side
    13,029.90x = 138,899,391.94
  5. Step 5: Solve for x
    x = 138,899,391.94/13,029.90
  6. Step 6: Final answer
    x = 10,660.05

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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.