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Finding the Fourth Proportional to 18,352.64, 27,491.70 and 8,478.20

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Solution

The fourth proportional to 18,352.64, 27,491.70 and 8,478.20 is: 12,700.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,352.64 : 27,491.70 = 8,478.20 : x
  2. Step 2: Convert to fraction form
    18,352.64/27,491.70 = 8,478.20/x
  3. Step 3: Cross multiply
    18,352.64x = 27,491.70 × 8,478.20
  4. Step 4: Simplify right side
    18,352.64x = 233,080,130.94
  5. Step 5: Solve for x
    x = 233,080,130.94/18,352.64
  6. Step 6: Final answer
    x = 12,700.09

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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.