Home / 12,970.80-19,456.20-4,206.60

Finding the Fourth Proportional to 12,970.80, 19,456.20 and 4,206.60

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Solution

The fourth proportional to 12,970.80, 19,456.20 and 4,206.60 is: 6,309.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,970.80 : 19,456.20 = 4,206.60 : x
  2. Step 2: Convert to fraction form
    12,970.80/19,456.20 = 4,206.60/x
  3. Step 3: Cross multiply
    12,970.80x = 19,456.20 × 4,206.60
  4. Step 4: Simplify right side
    12,970.80x = 81,844,450.92
  5. Step 5: Solve for x
    x = 81,844,450.92/12,970.80
  6. Step 6: Final answer
    x = 6,309.90

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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.