Home / 19,906.20-29,859.30-13,685.40

Finding the Fourth Proportional to 19,906.20, 29,859.30 and 13,685.40

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Solution

The fourth proportional to 19,906.20, 29,859.30 and 13,685.40 is: 20,528.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,906.20 : 29,859.30 = 13,685.40 : x
  2. Step 2: Convert to fraction form
    19,906.20/29,859.30 = 13,685.40/x
  3. Step 3: Cross multiply
    19,906.20x = 29,859.30 × 13,685.40
  4. Step 4: Simplify right side
    19,906.20x = 408,636,464.22
  5. Step 5: Solve for x
    x = 408,636,464.22/19,906.20
  6. Step 6: Final answer
    x = 20,528.10

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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.