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Finding the Fourth Proportional to 15,659.46, 21,611.61 and 8,946.18

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Solution

The fourth proportional to 15,659.46, 21,611.61 and 8,946.18 is: 12,346.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,659.46 : 21,611.61 = 8,946.18 : x
  2. Step 2: Convert to fraction form
    15,659.46/21,611.61 = 8,946.18/x
  3. Step 3: Cross multiply
    15,659.46x = 21,611.61 × 8,946.18
  4. Step 4: Simplify right side
    15,659.46x = 193,341,353.15
  5. Step 5: Solve for x
    x = 193,341,353.15/15,659.46
  6. Step 6: Final answer
    x = 12,346.62

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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.