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Finding the Fourth Proportional to 30,389.60, 45,564.60 and 27,279.20

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Solution

The fourth proportional to 30,389.60, 45,564.60 and 27,279.20 is: 40,901.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,389.60 : 45,564.60 = 27,279.20 : x
  2. Step 2: Convert to fraction form
    30,389.60/45,564.60 = 27,279.20/x
  3. Step 3: Cross multiply
    30,389.60x = 45,564.60 × 27,279.20
  4. Step 4: Simplify right side
    30,389.60x = 1,242,965,836.32
  5. Step 5: Solve for x
    x = 1,242,965,836.32/30,389.60
  6. Step 6: Final answer
    x = 40,901.03

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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.