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Finding the Fourth Proportional to 18,928.49, 28,399.01 and 8,397.07

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Solution

The fourth proportional to 18,928.49, 28,399.01 and 8,397.07 is: 12,598.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,928.49 : 28,399.01 = 8,397.07 : x
  2. Step 2: Convert to fraction form
    18,928.49/28,399.01 = 8,397.07/x
  3. Step 3: Cross multiply
    18,928.49x = 28,399.01 × 8,397.07
  4. Step 4: Simplify right side
    18,928.49x = 238,468,361.92
  5. Step 5: Solve for x
    x = 238,468,361.92/18,928.49
  6. Step 6: Final answer
    x = 12,598.39

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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.