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Finding the Fourth Proportional to 18,431.20, 27,646.80 and 4,580.20

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Solution

The fourth proportional to 18,431.20, 27,646.80 and 4,580.20 is: 6,870.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,431.20 : 27,646.80 = 4,580.20 : x
  2. Step 2: Convert to fraction form
    18,431.20/27,646.80 = 4,580.20/x
  3. Step 3: Cross multiply
    18,431.20x = 27,646.80 × 4,580.20
  4. Step 4: Simplify right side
    18,431.20x = 126,627,873.36
  5. Step 5: Solve for x
    x = 126,627,873.36/18,431.20
  6. Step 6: Final answer
    x = 6,870.30

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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.