Home / 5,678.89-8,518.38-1,981.19

Finding the Fourth Proportional to 5,678.89, 8,518.38 and 1,981.19

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Solution

The fourth proportional to 5,678.89, 8,518.38 and 1,981.19 is: 2,971.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,678.89 : 8,518.38 = 1,981.19 : x
  2. Step 2: Convert to fraction form
    5,678.89/8,518.38 = 1,981.19/x
  3. Step 3: Cross multiply
    5,678.89x = 8,518.38 × 1,981.19
  4. Step 4: Simplify right side
    5,678.89x = 16,876,529.27
  5. Step 5: Solve for x
    x = 16,876,529.27/5,678.89
  6. Step 6: Final answer
    x = 2,971.80

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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.