Home / 12,278.57-18,423.30-6,433.79

Finding the Fourth Proportional to 12,278.57, 18,423.30 and 6,433.79

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Solution

The fourth proportional to 12,278.57, 18,423.30 and 6,433.79 is: 9,653.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,278.57 : 18,423.30 = 6,433.79 : x
  2. Step 2: Convert to fraction form
    12,278.57/18,423.30 = 6,433.79/x
  3. Step 3: Cross multiply
    12,278.57x = 18,423.30 × 6,433.79
  4. Step 4: Simplify right side
    12,278.57x = 118,531,643.31
  5. Step 5: Solve for x
    x = 118,531,643.31/12,278.57
  6. Step 6: Final answer
    x = 9,653.54

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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.