Home / 12,289.56-18,438.41-4,892.05

Finding the Fourth Proportional to 12,289.56, 18,438.41 and 4,892.05

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Solution

The fourth proportional to 12,289.56, 18,438.41 and 4,892.05 is: 7,339.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,289.56 : 18,438.41 = 4,892.05 : x
  2. Step 2: Convert to fraction form
    12,289.56/18,438.41 = 4,892.05/x
  3. Step 3: Cross multiply
    12,289.56x = 18,438.41 × 4,892.05
  4. Step 4: Simplify right side
    12,289.56x = 90,201,623.64
  5. Step 5: Solve for x
    x = 90,201,623.64/12,289.56
  6. Step 6: Final answer
    x = 7,339.70

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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.