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Finding the Fourth Proportional to 18,977.83, 28,467.78 and 7,885.64

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Solution

The fourth proportional to 18,977.83, 28,467.78 and 7,885.64 is: 11,828.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,977.83 : 28,467.78 = 7,885.64 : x
  2. Step 2: Convert to fraction form
    18,977.83/28,467.78 = 7,885.64/x
  3. Step 3: Cross multiply
    18,977.83x = 28,467.78 × 7,885.64
  4. Step 4: Simplify right side
    18,977.83x = 224,486,522.34
  5. Step 5: Solve for x
    x = 224,486,522.34/18,977.83
  6. Step 6: Final answer
    x = 11,828.89

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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.