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Finding the Fourth Proportional to 13,367.78, 18,447.96 and 7,702.07

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Solution

The fourth proportional to 13,367.78, 18,447.96 and 7,702.07 is: 10,629.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,367.78 : 18,447.96 = 7,702.07 : x
  2. Step 2: Convert to fraction form
    13,367.78/18,447.96 = 7,702.07/x
  3. Step 3: Cross multiply
    13,367.78x = 18,447.96 × 7,702.07
  4. Step 4: Simplify right side
    13,367.78x = 142,087,479.28
  5. Step 5: Solve for x
    x = 142,087,479.28/13,367.78
  6. Step 6: Final answer
    x = 10,629.10

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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.