Home / 12,905.80-19,329.90-9,968.20

Finding the Fourth Proportional to 12,905.80, 19,329.90 and 9,968.20

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Solution

The fourth proportional to 12,905.80, 19,329.90 and 9,968.20 is: 14,930.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,905.80 : 19,329.90 = 9,968.20 : x
  2. Step 2: Convert to fraction form
    12,905.80/19,329.90 = 9,968.20/x
  3. Step 3: Cross multiply
    12,905.80x = 19,329.90 × 9,968.20
  4. Step 4: Simplify right side
    12,905.80x = 192,684,309.18
  5. Step 5: Solve for x
    x = 192,684,309.18/12,905.80
  6. Step 6: Final answer
    x = 14,930.06

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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.