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Finding the Fourth Proportional to 18,964.44, 28,462.14 and 13,423.16

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Solution

The fourth proportional to 18,964.44, 28,462.14 and 13,423.16 is: 20,145.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,964.44 : 28,462.14 = 13,423.16 : x
  2. Step 2: Convert to fraction form
    18,964.44/28,462.14 = 13,423.16/x
  3. Step 3: Cross multiply
    18,964.44x = 28,462.14 × 13,423.16
  4. Step 4: Simplify right side
    18,964.44x = 382,051,859.16
  5. Step 5: Solve for x
    x = 382,051,859.16/18,964.44
  6. Step 6: Final answer
    x = 20,145.70

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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.