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Finding the Fourth Proportional to 15,122.64, 20,866.95 and 8,408.34

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Solution

The fourth proportional to 15,122.64, 20,866.95 and 8,408.34 is: 11,602.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,122.64 : 20,866.95 = 8,408.34 : x
  2. Step 2: Convert to fraction form
    15,122.64/20,866.95 = 8,408.34/x
  3. Step 3: Cross multiply
    15,122.64x = 20,866.95 × 8,408.34
  4. Step 4: Simplify right side
    15,122.64x = 175,456,410.36
  5. Step 5: Solve for x
    x = 175,456,410.36/15,122.64
  6. Step 6: Final answer
    x = 11,602.23

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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.