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Finding the Fourth Proportional to 12,855, 17,754.48 and 8,655.96

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Solution

The fourth proportional to 12,855, 17,754.48 and 8,655.96 is: 11,955.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,855 : 17,754.48 = 8,655.96 : x
  2. Step 2: Convert to fraction form
    12,855/17,754.48 = 8,655.96/x
  3. Step 3: Cross multiply
    12,855x = 17,754.48 × 8,655.96
  4. Step 4: Simplify right side
    12,855x = 153,682,068.70
  5. Step 5: Solve for x
    x = 153,682,068.70/12,855
  6. Step 6: Final answer
    x = 11,955.04

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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.