Home / 13,418.40-18,516.48-7,450.05

Finding the Fourth Proportional to 13,418.40, 18,516.48 and 7,450.05

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Solution

The fourth proportional to 13,418.40, 18,516.48 and 7,450.05 is: 10,280.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,418.40 : 18,516.48 = 7,450.05 : x
  2. Step 2: Convert to fraction form
    13,418.40/18,516.48 = 7,450.05/x
  3. Step 3: Cross multiply
    13,418.40x = 18,516.48 × 7,450.05
  4. Step 4: Simplify right side
    13,418.40x = 137,948,701.82
  5. Step 5: Solve for x
    x = 137,948,701.82/13,418.40
  6. Step 6: Final answer
    x = 10,280.56

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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.