Home / 20,439.78-30,653.46-7,289.16

Finding the Fourth Proportional to 20,439.78, 30,653.46 and 7,289.16

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Solution

The fourth proportional to 20,439.78, 30,653.46 and 7,289.16 is: 10,931.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,439.78 : 30,653.46 = 7,289.16 : x
  2. Step 2: Convert to fraction form
    20,439.78/30,653.46 = 7,289.16/x
  3. Step 3: Cross multiply
    20,439.78x = 30,653.46 × 7,289.16
  4. Step 4: Simplify right side
    20,439.78x = 223,437,974.49
  5. Step 5: Solve for x
    x = 223,437,974.49/20,439.78
  6. Step 6: Final answer
    x = 10,931.53

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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.