Home / 7,108.80-10,661.84-1,913.36

Finding the Fourth Proportional to 7,108.80, 10,661.84 and 1,913.36

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Solution

The fourth proportional to 7,108.80, 10,661.84 and 1,913.36 is: 2,869.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,108.80 : 10,661.84 = 1,913.36 : x
  2. Step 2: Convert to fraction form
    7,108.80/10,661.84 = 1,913.36/x
  3. Step 3: Cross multiply
    7,108.80x = 10,661.84 × 1,913.36
  4. Step 4: Simplify right side
    7,108.80x = 20,399,938.18
  5. Step 5: Solve for x
    x = 20,399,938.18/7,108.80
  6. Step 6: Final answer
    x = 2,869.67

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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.