Home / 13,578.78-18,739.45-7,612.36

Finding the Fourth Proportional to 13,578.78, 18,739.45 and 7,612.36

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Solution

The fourth proportional to 13,578.78, 18,739.45 and 7,612.36 is: 10,505.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,578.78 : 18,739.45 = 7,612.36 : x
  2. Step 2: Convert to fraction form
    13,578.78/18,739.45 = 7,612.36/x
  3. Step 3: Cross multiply
    13,578.78x = 18,739.45 × 7,612.36
  4. Step 4: Simplify right side
    13,578.78x = 142,651,439.60
  5. Step 5: Solve for x
    x = 142,651,439.60/13,578.78
  6. Step 6: Final answer
    x = 10,505.47

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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.