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Finding the Fourth Proportional to 18,593,146.40, 27,889,719.60 and 18,486,858.20

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Solution

The fourth proportional to 18,593,146.40, 27,889,719.60 and 18,486,858.20 is: 27,730,287.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,593,146.40 : 27,889,719.60 = 18,486,858.20 : x
  2. Step 2: Convert to fraction form
    18,593,146.40/27,889,719.60 = 18,486,858.20/x
  3. Step 3: Cross multiply
    18,593,146.40x = 27,889,719.60 × 18,486,858.20
  4. Step 4: Simplify right side
    18,593,146.40x = 515,593,291,482,960.75
  5. Step 5: Solve for x
    x = 515,593,291,482,960.75/18,593,146.40
  6. Step 6: Final answer
    x = 27,730,287.30

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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.