Home / 13,211.70-18,228.96-7,908.36

Finding the Fourth Proportional to 13,211.70, 18,228.96 and 7,908.36

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Solution

The fourth proportional to 13,211.70, 18,228.96 and 7,908.36 is: 10,911.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,211.70 : 18,228.96 = 7,908.36 : x
  2. Step 2: Convert to fraction form
    13,211.70/18,228.96 = 7,908.36/x
  3. Step 3: Cross multiply
    13,211.70x = 18,228.96 × 7,908.36
  4. Step 4: Simplify right side
    13,211.70x = 144,161,178.11
  5. Step 5: Solve for x
    x = 144,161,178.11/13,211.70
  6. Step 6: Final answer
    x = 10,911.63

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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.