Home / 13,693.36-18,896.78-7,405.72

Finding the Fourth Proportional to 13,693.36, 18,896.78 and 7,405.72

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Solution

The fourth proportional to 13,693.36, 18,896.78 and 7,405.72 is: 10,219.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,693.36 : 18,896.78 = 7,405.72 : x
  2. Step 2: Convert to fraction form
    13,693.36/18,896.78 = 7,405.72/x
  3. Step 3: Cross multiply
    13,693.36x = 18,896.78 × 7,405.72
  4. Step 4: Simplify right side
    13,693.36x = 139,944,261.58
  5. Step 5: Solve for x
    x = 139,944,261.58/13,693.36
  6. Step 6: Final answer
    x = 10,219.86

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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.