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Finding the Fourth Proportional to 15,640.57, 21,583.15 and 8,565.62

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Solution

The fourth proportional to 15,640.57, 21,583.15 and 8,565.62 is: 11,820.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,640.57 : 21,583.15 = 8,565.62 : x
  2. Step 2: Convert to fraction form
    15,640.57/21,583.15 = 8,565.62/x
  3. Step 3: Cross multiply
    15,640.57x = 21,583.15 × 8,565.62
  4. Step 4: Simplify right side
    15,640.57x = 184,873,093.85
  5. Step 5: Solve for x
    x = 184,873,093.85/15,640.57
  6. Step 6: Final answer
    x = 11,820.10

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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.