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Finding the Fourth Proportional to 20,468.70, 30,586.51 and 15,369.64

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Solution

The fourth proportional to 20,468.70, 30,586.51 and 15,369.64 is: 22,966.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,468.70 : 30,586.51 = 15,369.64 : x
  2. Step 2: Convert to fraction form
    20,468.70/30,586.51 = 15,369.64/x
  3. Step 3: Cross multiply
    20,468.70x = 30,586.51 × 15,369.64
  4. Step 4: Simplify right side
    20,468.70x = 470,103,647.56
  5. Step 5: Solve for x
    x = 470,103,647.56/20,468.70
  6. Step 6: Final answer
    x = 22,966.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.