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Finding the Fourth Proportional to 12,328.88, 17,013.92 and 6,739.88

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Solution

The fourth proportional to 12,328.88, 17,013.92 and 6,739.88 is: 9,301.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,328.88 : 17,013.92 = 6,739.88 : x
  2. Step 2: Convert to fraction form
    12,328.88/17,013.92 = 6,739.88/x
  3. Step 3: Cross multiply
    12,328.88x = 17,013.92 × 6,739.88
  4. Step 4: Simplify right side
    12,328.88x = 114,671,660.36
  5. Step 5: Solve for x
    x = 114,671,660.36/12,328.88
  6. Step 6: Final answer
    x = 9,301.06

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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.