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Finding the Fourth Proportional to 18,889.72, 26,073.72 and 12,919.24

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Solution

The fourth proportional to 18,889.72, 26,073.72 and 12,919.24 is: 17,832.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,889.72 : 26,073.72 = 12,919.24 : x
  2. Step 2: Convert to fraction form
    18,889.72/26,073.72 = 12,919.24/x
  3. Step 3: Cross multiply
    18,889.72x = 26,073.72 × 12,919.24
  4. Step 4: Simplify right side
    18,889.72x = 336,852,646.37
  5. Step 5: Solve for x
    x = 336,852,646.37/18,889.72
  6. Step 6: Final answer
    x = 17,832.59

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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.