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Finding the Fourth Proportional to 12,539.00, 18,665.16 and 12,352.20

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Solution

The fourth proportional to 12,539.00, 18,665.16 and 12,352.20 is: 18,387.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,539.00 : 18,665.16 = 12,352.20 : x
  2. Step 2: Convert to fraction form
    12,539.00/18,665.16 = 12,352.20/x
  3. Step 3: Cross multiply
    12,539.00x = 18,665.16 × 12,352.20
  4. Step 4: Simplify right side
    12,539.00x = 230,555,789.35
  5. Step 5: Solve for x
    x = 230,555,789.35/12,539.00
  6. Step 6: Final answer
    x = 18,387.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.