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Finding the Fourth Proportional to 15,611.56, 23,422.78 and 7,818.60

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Solution

The fourth proportional to 15,611.56, 23,422.78 and 7,818.60 is: 11,730.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,611.56 : 23,422.78 = 7,818.60 : x
  2. Step 2: Convert to fraction form
    15,611.56/23,422.78 = 7,818.60/x
  3. Step 3: Cross multiply
    15,611.56x = 23,422.78 × 7,818.60
  4. Step 4: Simplify right side
    15,611.56x = 183,133,347.71
  5. Step 5: Solve for x
    x = 183,133,347.71/15,611.56
  6. Step 6: Final answer
    x = 11,730.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.