Home / 12,420.50-18,630.80-11,797.62

Finding the Fourth Proportional to 12,420.50, 18,630.80 and 11,797.62

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Solution

The fourth proportional to 12,420.50, 18,630.80 and 11,797.62 is: 17,696.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,420.50 : 18,630.80 = 11,797.62 : x
  2. Step 2: Convert to fraction form
    12,420.50/18,630.80 = 11,797.62/x
  3. Step 3: Cross multiply
    12,420.50x = 18,630.80 × 11,797.62
  4. Step 4: Simplify right side
    12,420.50x = 219,799,098.70
  5. Step 5: Solve for x
    x = 219,799,098.70/12,420.50
  6. Step 6: Final answer
    x = 17,696.48

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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.