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Finding the Fourth Proportional to 13,051.68, 18,006.84 and 7,385.76

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Solution

The fourth proportional to 13,051.68, 18,006.84 and 7,385.76 is: 10,189.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,051.68 : 18,006.84 = 7,385.76 : x
  2. Step 2: Convert to fraction form
    13,051.68/18,006.84 = 7,385.76/x
  3. Step 3: Cross multiply
    13,051.68x = 18,006.84 × 7,385.76
  4. Step 4: Simplify right side
    13,051.68x = 132,994,198.60
  5. Step 5: Solve for x
    x = 132,994,198.60/13,051.68
  6. Step 6: Final answer
    x = 10,189.81

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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.