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Finding the Fourth Proportional to 15,659.46, 21,611.07 and 8,855.19

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Solution

The fourth proportional to 15,659.46, 21,611.07 and 8,855.19 is: 12,220.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,659.46 : 21,611.07 = 8,855.19 : x
  2. Step 2: Convert to fraction form
    15,659.46/21,611.07 = 8,855.19/x
  3. Step 3: Cross multiply
    15,659.46x = 21,611.07 × 8,855.19
  4. Step 4: Simplify right side
    15,659.46x = 191,370,130.95
  5. Step 5: Solve for x
    x = 191,370,130.95/15,659.46
  6. Step 6: Final answer
    x = 12,220.74

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Half scale
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Double scale
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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.