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Finding the Fourth Proportional to 13,818.30, 20,727.45 and 13,818.30

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Solution

The fourth proportional to 13,818.30, 20,727.45 and 13,818.30 is: 20,727.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,818.30 : 20,727.45 = 13,818.30 : x
  2. Step 2: Convert to fraction form
    13,818.30/20,727.45 = 13,818.30/x
  3. Step 3: Cross multiply
    13,818.30x = 20,727.45 × 13,818.30
  4. Step 4: Simplify right side
    13,818.30x = 286,418,122.34
  5. Step 5: Solve for x
    x = 286,418,122.34/13,818.30
  6. Step 6: Final answer
    x = 20,727.45

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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.