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Finding the Fourth Proportional to 20,653.60, 30,958.74 and 10,109.08

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Solution

The fourth proportional to 20,653.60, 30,958.74 and 10,109.08 is: 15,153.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,653.60 : 30,958.74 = 10,109.08 : x
  2. Step 2: Convert to fraction form
    20,653.60/30,958.74 = 10,109.08/x
  3. Step 3: Cross multiply
    20,653.60x = 30,958.74 × 10,109.08
  4. Step 4: Simplify right side
    20,653.60x = 312,964,379.36
  5. Step 5: Solve for x
    x = 312,964,379.36/20,653.60
  6. Step 6: Final answer
    x = 15,153.02

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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.