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Finding the Fourth Proportional to 13,695.36, 18,899.63 and 7,407.73

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Solution

The fourth proportional to 13,695.36, 18,899.63 and 7,407.73 is: 10,222.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,695.36 : 18,899.63 = 7,407.73 : x
  2. Step 2: Convert to fraction form
    13,695.36/18,899.63 = 7,407.73/x
  3. Step 3: Cross multiply
    13,695.36x = 18,899.63 × 7,407.73
  4. Step 4: Simplify right side
    13,695.36x = 140,003,356.14
  5. Step 5: Solve for x
    x = 140,003,356.14/13,695.36
  6. Step 6: Final answer
    x = 10,222.69

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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.