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Finding the Fourth Proportional to 13,039.71, 17,994.48 and 7,218.63

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Solution

The fourth proportional to 13,039.71, 17,994.48 and 7,218.63 is: 9,961.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,039.71 : 17,994.48 = 7,218.63 : x
  2. Step 2: Convert to fraction form
    13,039.71/17,994.48 = 7,218.63/x
  3. Step 3: Cross multiply
    13,039.71x = 17,994.48 × 7,218.63
  4. Step 4: Simplify right side
    13,039.71x = 129,895,493.16
  5. Step 5: Solve for x
    x = 129,895,493.16/13,039.71
  6. Step 6: Final answer
    x = 9,961.53

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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.