Home / 4,989.74-6,879.75-3,123.50

Finding the Fourth Proportional to 4,989.74, 6,879.75 and 3,123.50

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Solution

The fourth proportional to 4,989.74, 6,879.75 and 3,123.50 is: 4,306.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,989.74 : 6,879.75 = 3,123.50 : x
  2. Step 2: Convert to fraction form
    4,989.74/6,879.75 = 3,123.50/x
  3. Step 3: Cross multiply
    4,989.74x = 6,879.75 × 3,123.50
  4. Step 4: Simplify right side
    4,989.74x = 21,488,899.13
  5. Step 5: Solve for x
    x = 21,488,899.13/4,989.74
  6. Step 6: Final answer
    x = 4,306.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.