Home / 13,930.38-19,219.78-7,880.29

Finding the Fourth Proportional to 13,930.38, 19,219.78 and 7,880.29

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Solution

The fourth proportional to 13,930.38, 19,219.78 and 7,880.29 is: 10,872.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,930.38 : 19,219.78 = 7,880.29 : x
  2. Step 2: Convert to fraction form
    13,930.38/19,219.78 = 7,880.29/x
  3. Step 3: Cross multiply
    13,930.38x = 19,219.78 × 7,880.29
  4. Step 4: Simplify right side
    13,930.38x = 151,457,401.94
  5. Step 5: Solve for x
    x = 151,457,401.94/13,930.38
  6. Step 6: Final answer
    x = 10,872.45

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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.