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Finding the Fourth Proportional to 6,879.40, 9,491.40 and 4,045.87

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Solution

The fourth proportional to 6,879.40, 9,491.40 and 4,045.87 is: 5,582.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,879.40 : 9,491.40 = 4,045.87 : x
  2. Step 2: Convert to fraction form
    6,879.40/9,491.40 = 4,045.87/x
  3. Step 3: Cross multiply
    6,879.40x = 9,491.40 × 4,045.87
  4. Step 4: Simplify right side
    6,879.40x = 38,400,970.52
  5. Step 5: Solve for x
    x = 38,400,970.52/6,879.40
  6. Step 6: Final answer
    x = 5,582.02

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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.