Home / 18,961.40-28,446.79-8,570.36

Finding the Fourth Proportional to 18,961.40, 28,446.79 and 8,570.36

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Solution

The fourth proportional to 18,961.40, 28,446.79 and 8,570.36 is: 12,857.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,961.40 : 28,446.79 = 8,570.36 : x
  2. Step 2: Convert to fraction form
    18,961.40/28,446.79 = 8,570.36/x
  3. Step 3: Cross multiply
    18,961.40x = 28,446.79 × 8,570.36
  4. Step 4: Simplify right side
    18,961.40x = 243,799,231.14
  5. Step 5: Solve for x
    x = 243,799,231.14/18,961.40
  6. Step 6: Final answer
    x = 12,857.66

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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.