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Finding the Fourth Proportional to 15,621.03, 21,557.52 and 8,906.52

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Solution

The fourth proportional to 15,621.03, 21,557.52 and 8,906.52 is: 12,291.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,621.03 : 21,557.52 = 8,906.52 : x
  2. Step 2: Convert to fraction form
    15,621.03/21,557.52 = 8,906.52/x
  3. Step 3: Cross multiply
    15,621.03x = 21,557.52 × 8,906.52
  4. Step 4: Simplify right side
    15,621.03x = 192,002,483.03
  5. Step 5: Solve for x
    x = 192,002,483.03/15,621.03
  6. Step 6: Final answer
    x = 12,291.28

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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.