Home / 12,903.90-19,358.55-4,139.70

Finding the Fourth Proportional to 12,903.90, 19,358.55 and 4,139.70

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Solution

The fourth proportional to 12,903.90, 19,358.55 and 4,139.70 is: 6,210.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,903.90 : 19,358.55 = 4,139.70 : x
  2. Step 2: Convert to fraction form
    12,903.90/19,358.55 = 4,139.70/x
  3. Step 3: Cross multiply
    12,903.90x = 19,358.55 × 4,139.70
  4. Step 4: Simplify right side
    12,903.90x = 80,138,589.44
  5. Step 5: Solve for x
    x = 80,138,589.44/12,903.90
  6. Step 6: Final answer
    x = 6,210.42

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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.