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Finding the Fourth Proportional to 15,640.44, 21,583.01 and 8,565.50

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Solution

The fourth proportional to 15,640.44, 21,583.01 and 8,565.50 is: 11,819.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,640.44 : 21,583.01 = 8,565.50 : x
  2. Step 2: Convert to fraction form
    15,640.44/21,583.01 = 8,565.50/x
  3. Step 3: Cross multiply
    15,640.44x = 21,583.01 × 8,565.50
  4. Step 4: Simplify right side
    15,640.44x = 184,869,272.16
  5. Step 5: Solve for x
    x = 184,869,272.16/15,640.44
  6. Step 6: Final answer
    x = 11,819.95

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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.