Home / 12,730.60-19,110.30-9,821.80

Finding the Fourth Proportional to 12,730.60, 19,110.30 and 9,821.80

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Solution

The fourth proportional to 12,730.60, 19,110.30 and 9,821.80 is: 14,743.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,730.60 : 19,110.30 = 9,821.80 : x
  2. Step 2: Convert to fraction form
    12,730.60/19,110.30 = 9,821.80/x
  3. Step 3: Cross multiply
    12,730.60x = 19,110.30 × 9,821.80
  4. Step 4: Simplify right side
    12,730.60x = 187,697,544.54
  5. Step 5: Solve for x
    x = 187,697,544.54/12,730.60
  6. Step 6: Final answer
    x = 14,743.81

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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.