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Finding the Fourth Proportional to 20,348.40, 30,479.40 and 16,892.40

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Solution

The fourth proportional to 20,348.40, 30,479.40 and 16,892.40 is: 25,302.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,348.40 : 30,479.40 = 16,892.40 : x
  2. Step 2: Convert to fraction form
    20,348.40/30,479.40 = 16,892.40/x
  3. Step 3: Cross multiply
    20,348.40x = 30,479.40 × 16,892.40
  4. Step 4: Simplify right side
    20,348.40x = 514,870,216.56
  5. Step 5: Solve for x
    x = 514,870,216.56/20,348.40
  6. Step 6: Final answer
    x = 25,302.74

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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.