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Finding the Fourth Proportional to 15,339.37, 21,168.22 and 8,715.37

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Solution

The fourth proportional to 15,339.37, 21,168.22 and 8,715.37 is: 12,027.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,339.37 : 21,168.22 = 8,715.37 : x
  2. Step 2: Convert to fraction form
    15,339.37/21,168.22 = 8,715.37/x
  3. Step 3: Cross multiply
    15,339.37x = 21,168.22 × 8,715.37
  4. Step 4: Simplify right side
    15,339.37x = 184,488,869.54
  5. Step 5: Solve for x
    x = 184,488,869.54/15,339.37
  6. Step 6: Final answer
    x = 12,027.15

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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.