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Finding the Fourth Proportional to 7,388.76, 11,039.85 and 7,130.37

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Solution

The fourth proportional to 7,388.76, 11,039.85 and 7,130.37 is: 10,653.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,388.76 : 11,039.85 = 7,130.37 : x
  2. Step 2: Convert to fraction form
    7,388.76/11,039.85 = 7,130.37/x
  3. Step 3: Cross multiply
    7,388.76x = 11,039.85 × 7,130.37
  4. Step 4: Simplify right side
    7,388.76x = 78,718,215.24
  5. Step 5: Solve for x
    x = 78,718,215.24/7,388.76
  6. Step 6: Final answer
    x = 10,653.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.