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Finding the Fourth Proportional to 7,419.99, 11,130.57 and 2,489.63

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Solution

The fourth proportional to 7,419.99, 11,130.57 and 2,489.63 is: 3,734.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,419.99 : 11,130.57 = 2,489.63 : x
  2. Step 2: Convert to fraction form
    7,419.99/11,130.57 = 2,489.63/x
  3. Step 3: Cross multiply
    7,419.99x = 11,130.57 × 2,489.63
  4. Step 4: Simplify right side
    7,419.99x = 27,710,945.34
  5. Step 5: Solve for x
    x = 27,710,945.34/7,419.99
  6. Step 6: Final answer
    x = 3,734.63

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.