Home / 13,738.64-18,959.19-7,771.47

Finding the Fourth Proportional to 13,738.64, 18,959.19 and 7,771.47

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Solution

The fourth proportional to 13,738.64, 18,959.19 and 7,771.47 is: 10,724.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,738.64 : 18,959.19 = 7,771.47 : x
  2. Step 2: Convert to fraction form
    13,738.64/18,959.19 = 7,771.47/x
  3. Step 3: Cross multiply
    13,738.64x = 18,959.19 × 7,771.47
  4. Step 4: Simplify right side
    13,738.64x = 147,340,776.31
  5. Step 5: Solve for x
    x = 147,340,776.31/13,738.64
  6. Step 6: Final answer
    x = 10,724.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.