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Finding the Fourth Proportional to 9,879.70, 13,633.99 and 5,572.85

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Solution

The fourth proportional to 9,879.70, 13,633.99 and 5,572.85 is: 7,690.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,879.70 : 13,633.99 = 5,572.85 : x
  2. Step 2: Convert to fraction form
    9,879.70/13,633.99 = 5,572.85/x
  3. Step 3: Cross multiply
    9,879.70x = 13,633.99 × 5,572.85
  4. Step 4: Simplify right side
    9,879.70x = 75,980,130.42
  5. Step 5: Solve for x
    x = 75,980,130.42/9,879.70
  6. Step 6: Final answer
    x = 7,690.53

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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.