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Finding the Fourth Proportional to 18,420.60, 27,611.86 and 10,506.09

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Solution

The fourth proportional to 18,420.60, 27,611.86 and 10,506.09 is: 15,748.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,420.60 : 27,611.86 = 10,506.09 : x
  2. Step 2: Convert to fraction form
    18,420.60/27,611.86 = 10,506.09/x
  3. Step 3: Cross multiply
    18,420.60x = 27,611.86 × 10,506.09
  4. Step 4: Simplify right side
    18,420.60x = 290,092,686.23
  5. Step 5: Solve for x
    x = 290,092,686.23/18,420.60
  6. Step 6: Final answer
    x = 15,748.28

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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.