Home / 13,478.38-18,600.35-7,813.54

Finding the Fourth Proportional to 13,478.38, 18,600.35 and 7,813.54

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Solution

The fourth proportional to 13,478.38, 18,600.35 and 7,813.54 is: 10,782.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,478.38 : 18,600.35 = 7,813.54 : x
  2. Step 2: Convert to fraction form
    13,478.38/18,600.35 = 7,813.54/x
  3. Step 3: Cross multiply
    13,478.38x = 18,600.35 × 7,813.54
  4. Step 4: Simplify right side
    13,478.38x = 145,334,578.74
  5. Step 5: Solve for x
    x = 145,334,578.74/13,478.38
  6. Step 6: Final answer
    x = 10,782.79

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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.