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Finding the Fourth Proportional to 20,590.88, 30,867.99 and 7,440.32

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Solution

The fourth proportional to 20,590.88, 30,867.99 and 7,440.32 is: 11,153.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,590.88 : 30,867.99 = 7,440.32 : x
  2. Step 2: Convert to fraction form
    20,590.88/30,867.99 = 7,440.32/x
  3. Step 3: Cross multiply
    20,590.88x = 30,867.99 × 7,440.32
  4. Step 4: Simplify right side
    20,590.88x = 229,667,772.63
  5. Step 5: Solve for x
    x = 229,667,772.63/20,590.88
  6. Step 6: Final answer
    x = 11,153.86

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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.