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Finding the Fourth Proportional to 12,489.77, 18,743.16 and 6,650.48

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Solution

The fourth proportional to 12,489.77, 18,743.16 and 6,650.48 is: 9,980.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,489.77 : 18,743.16 = 6,650.48 : x
  2. Step 2: Convert to fraction form
    12,489.77/18,743.16 = 6,650.48/x
  3. Step 3: Cross multiply
    12,489.77x = 18,743.16 × 6,650.48
  4. Step 4: Simplify right side
    12,489.77x = 124,651,010.72
  5. Step 5: Solve for x
    x = 124,651,010.72/12,489.77
  6. Step 6: Final answer
    x = 9,980.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.