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Finding the Fourth Proportional to 13,659.84, 18,862.92 and 8,632.98

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Solution

The fourth proportional to 13,659.84, 18,862.92 and 8,632.98 is: 11,921.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,659.84 : 18,862.92 = 8,632.98 : x
  2. Step 2: Convert to fraction form
    13,659.84/18,862.92 = 8,632.98/x
  3. Step 3: Cross multiply
    13,659.84x = 18,862.92 × 8,632.98
  4. Step 4: Simplify right side
    13,659.84x = 162,843,211.10
  5. Step 5: Solve for x
    x = 162,843,211.10/13,659.84
  6. Step 6: Final answer
    x = 11,921.31

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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.