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Finding the Fourth Proportional to 15,343.87, 21,174.43 and 8,719.87

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Solution

The fourth proportional to 15,343.87, 21,174.43 and 8,719.87 is: 12,033.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,343.87 : 21,174.43 = 8,719.87 : x
  2. Step 2: Convert to fraction form
    15,343.87/21,174.43 = 8,719.87/x
  3. Step 3: Cross multiply
    15,343.87x = 21,174.43 × 8,719.87
  4. Step 4: Simplify right side
    15,343.87x = 184,638,276.92
  5. Step 5: Solve for x
    x = 184,638,276.92/15,343.87
  6. Step 6: Final answer
    x = 12,033.36

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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.