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Finding the Fourth Proportional to 19,236.64, 28,837.64 and 6,921.76

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Solution

The fourth proportional to 19,236.64, 28,837.64 and 6,921.76 is: 10,376.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,236.64 : 28,837.64 = 6,921.76 : x
  2. Step 2: Convert to fraction form
    19,236.64/28,837.64 = 6,921.76/x
  3. Step 3: Cross multiply
    19,236.64x = 28,837.64 × 6,921.76
  4. Step 4: Simplify right side
    19,236.64x = 199,607,223.05
  5. Step 5: Solve for x
    x = 199,607,223.05/19,236.64
  6. Step 6: Final answer
    x = 10,376.41

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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.