Home / 18,971.61-28,456.80-8,583.36

Finding the Fourth Proportional to 18,971.61, 28,456.80 and 8,583.36

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Solution

The fourth proportional to 18,971.61, 28,456.80 and 8,583.36 is: 12,874.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,971.61 : 28,456.80 = 8,583.36 : x
  2. Step 2: Convert to fraction form
    18,971.61/28,456.80 = 8,583.36/x
  3. Step 3: Cross multiply
    18,971.61x = 28,456.80 × 8,583.36
  4. Step 4: Simplify right side
    18,971.61x = 244,254,958.85
  5. Step 5: Solve for x
    x = 244,254,958.85/18,971.61
  6. Step 6: Final answer
    x = 12,874.76

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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.