Home / 20,639.08-30,958.56-7,491.40

Finding the Fourth Proportional to 20,639.08, 30,958.56 and 7,491.40

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Solution

The fourth proportional to 20,639.08, 30,958.56 and 7,491.40 is: 11,237.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,639.08 : 30,958.56 = 7,491.40 : x
  2. Step 2: Convert to fraction form
    20,639.08/30,958.56 = 7,491.40/x
  3. Step 3: Cross multiply
    20,639.08x = 30,958.56 × 7,491.40
  4. Step 4: Simplify right side
    20,639.08x = 231,922,956.38
  5. Step 5: Solve for x
    x = 231,922,956.38/20,639.08
  6. Step 6: Final answer
    x = 11,237.08

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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.