Home / 18,977.89-28,467.87-7,885.70

Finding the Fourth Proportional to 18,977.89, 28,467.87 and 7,885.70

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Solution

The fourth proportional to 18,977.89, 28,467.87 and 7,885.70 is: 11,828.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,977.89 : 28,467.87 = 7,885.70 : x
  2. Step 2: Convert to fraction form
    18,977.89/28,467.87 = 7,885.70/x
  3. Step 3: Cross multiply
    18,977.89x = 28,467.87 × 7,885.70
  4. Step 4: Simplify right side
    18,977.89x = 224,489,082.46
  5. Step 5: Solve for x
    x = 224,489,082.46/18,977.89
  6. Step 6: Final answer
    x = 11,828.98

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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.