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Finding the Fourth Proportional to 13,663.50, 18,856.22 and 7,695.51

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Solution

The fourth proportional to 13,663.50, 18,856.22 and 7,695.51 is: 10,620.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,663.50 : 18,856.22 = 7,695.51 : x
  2. Step 2: Convert to fraction form
    13,663.50/18,856.22 = 7,695.51/x
  3. Step 3: Cross multiply
    13,663.50x = 18,856.22 × 7,695.51
  4. Step 4: Simplify right side
    13,663.50x = 145,108,191.09
  5. Step 5: Solve for x
    x = 145,108,191.09/13,663.50
  6. Step 6: Final answer
    x = 10,620.13

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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.