Home / 13,396.85-18,487.37-7,428.15

Finding the Fourth Proportional to 13,396.85, 18,487.37 and 7,428.15

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Solution

The fourth proportional to 13,396.85, 18,487.37 and 7,428.15 is: 10,250.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,396.85 : 18,487.37 = 7,428.15 : x
  2. Step 2: Convert to fraction form
    13,396.85/18,487.37 = 7,428.15/x
  3. Step 3: Cross multiply
    13,396.85x = 18,487.37 × 7,428.15
  4. Step 4: Simplify right side
    13,396.85x = 137,326,920.32
  5. Step 5: Solve for x
    x = 137,326,920.32/13,396.85
  6. Step 6: Final answer
    x = 10,250.69

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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.