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Finding the Fourth Proportional to 13,245.29, 18,280.12 and 7,656.29

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Solution

The fourth proportional to 13,245.29, 18,280.12 and 7,656.29 is: 10,566.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,245.29 : 18,280.12 = 7,656.29 : x
  2. Step 2: Convert to fraction form
    13,245.29/18,280.12 = 7,656.29/x
  3. Step 3: Cross multiply
    13,245.29x = 18,280.12 × 7,656.29
  4. Step 4: Simplify right side
    13,245.29x = 139,957,789.41
  5. Step 5: Solve for x
    x = 139,957,789.41/13,245.29
  6. Step 6: Final answer
    x = 10,566.61

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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.