Home / 12,639.80-18,959.70-8,492.60

Finding the Fourth Proportional to 12,639.80, 18,959.70 and 8,492.60

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Solution

The fourth proportional to 12,639.80, 18,959.70 and 8,492.60 is: 12,738.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,639.80 : 18,959.70 = 8,492.60 : x
  2. Step 2: Convert to fraction form
    12,639.80/18,959.70 = 8,492.60/x
  3. Step 3: Cross multiply
    12,639.80x = 18,959.70 × 8,492.60
  4. Step 4: Simplify right side
    12,639.80x = 161,017,148.22
  5. Step 5: Solve for x
    x = 161,017,148.22/12,639.80
  6. Step 6: Final answer
    x = 12,738.90

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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.