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Finding the Fourth Proportional to 13,617.99, 18,792.21 and 7,953.03

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Solution

The fourth proportional to 13,617.99, 18,792.21 and 7,953.03 is: 10,974.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,617.99 : 18,792.21 = 7,953.03 : x
  2. Step 2: Convert to fraction form
    13,617.99/18,792.21 = 7,953.03/x
  3. Step 3: Cross multiply
    13,617.99x = 18,792.21 × 7,953.03
  4. Step 4: Simplify right side
    13,617.99x = 149,455,009.90
  5. Step 5: Solve for x
    x = 149,455,009.90/13,617.99
  6. Step 6: Final answer
    x = 10,974.82

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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.