Home / 19,087.02-28,620.78-7,990.68

Finding the Fourth Proportional to 19,087.02, 28,620.78 and 7,990.68

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Solution

The fourth proportional to 19,087.02, 28,620.78 and 7,990.68 is: 11,981.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,087.02 : 28,620.78 = 7,990.68 : x
  2. Step 2: Convert to fraction form
    19,087.02/28,620.78 = 7,990.68/x
  3. Step 3: Cross multiply
    19,087.02x = 28,620.78 × 7,990.68
  4. Step 4: Simplify right side
    19,087.02x = 228,699,494.33
  5. Step 5: Solve for x
    x = 228,699,494.33/19,087.02
  6. Step 6: Final answer
    x = 11,981.94

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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.