Home / 12,680.40-19,019.40-4,359.60

Finding the Fourth Proportional to 12,680.40, 19,019.40 and 4,359.60

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Solution

The fourth proportional to 12,680.40, 19,019.40 and 4,359.60 is: 6,538.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,680.40 : 19,019.40 = 4,359.60 : x
  2. Step 2: Convert to fraction form
    12,680.40/19,019.40 = 4,359.60/x
  3. Step 3: Cross multiply
    12,680.40x = 19,019.40 × 4,359.60
  4. Step 4: Simplify right side
    12,680.40x = 82,916,976.24
  5. Step 5: Solve for x
    x = 82,916,976.24/12,680.40
  6. Step 6: Final answer
    x = 6,538.99

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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.