Home / 12,746.87-19,120.37-3,981.05

Finding the Fourth Proportional to 12,746.87, 19,120.37 and 3,981.05

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Solution

The fourth proportional to 12,746.87, 19,120.37 and 3,981.05 is: 5,971.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,746.87 : 19,120.37 = 3,981.05 : x
  2. Step 2: Convert to fraction form
    12,746.87/19,120.37 = 3,981.05/x
  3. Step 3: Cross multiply
    12,746.87x = 19,120.37 × 3,981.05
  4. Step 4: Simplify right side
    12,746.87x = 76,119,148.99
  5. Step 5: Solve for x
    x = 76,119,148.99/12,746.87
  6. Step 6: Final answer
    x = 5,971.60

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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.