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Finding the Fourth Proportional to 5,679.51, 8,472.67 and 5,281.80

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Solution

The fourth proportional to 5,679.51, 8,472.67 and 5,281.80 is: 7,879.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,679.51 : 8,472.67 = 5,281.80 : x
  2. Step 2: Convert to fraction form
    5,679.51/8,472.67 = 5,281.80/x
  3. Step 3: Cross multiply
    5,679.51x = 8,472.67 × 5,281.80
  4. Step 4: Simplify right side
    5,679.51x = 44,750,948.41
  5. Step 5: Solve for x
    x = 44,750,948.41/5,679.51
  6. Step 6: Final answer
    x = 7,879.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.