Home / 13,738.60-18,959.61-7,769.98

Finding the Fourth Proportional to 13,738.60, 18,959.61 and 7,769.98

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Solution

The fourth proportional to 13,738.60, 18,959.61 and 7,769.98 is: 10,722.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,738.60 : 18,959.61 = 7,769.98 : x
  2. Step 2: Convert to fraction form
    13,738.60/18,959.61 = 7,769.98/x
  3. Step 3: Cross multiply
    13,738.60x = 18,959.61 × 7,769.98
  4. Step 4: Simplify right side
    13,738.60x = 147,315,790.51
  5. Step 5: Solve for x
    x = 147,315,790.51/13,738.60
  6. Step 6: Final answer
    x = 10,722.77

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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.