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Finding the Fourth Proportional to 18,456.64, 25,461.30 and 12,080.42

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Solution

The fourth proportional to 18,456.64, 25,461.30 and 12,080.42 is: 16,665.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,456.64 : 25,461.30 = 12,080.42 : x
  2. Step 2: Convert to fraction form
    18,456.64/25,461.30 = 12,080.42/x
  3. Step 3: Cross multiply
    18,456.64x = 25,461.30 × 12,080.42
  4. Step 4: Simplify right side
    18,456.64x = 307,583,261.40
  5. Step 5: Solve for x
    x = 307,583,261.40/18,456.64
  6. Step 6: Final answer
    x = 16,665.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.