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Finding the Fourth Proportional to 16,935.40, 25,359.90 and 13,479.40

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Solution

The fourth proportional to 16,935.40, 25,359.90 and 13,479.40 is: 20,184.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,935.40 : 25,359.90 = 13,479.40 : x
  2. Step 2: Convert to fraction form
    16,935.40/25,359.90 = 13,479.40/x
  3. Step 3: Cross multiply
    16,935.40x = 25,359.90 × 13,479.40
  4. Step 4: Simplify right side
    16,935.40x = 341,836,236.06
  5. Step 5: Solve for x
    x = 341,836,236.06/16,935.40
  6. Step 6: Final answer
    x = 20,184.72

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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.