Home / 13,746.36-18,971.82-8,157.72

Finding the Fourth Proportional to 13,746.36, 18,971.82 and 8,157.72

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Solution

The fourth proportional to 13,746.36, 18,971.82 and 8,157.72 is: 11,258.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,746.36 : 18,971.82 = 8,157.72 : x
  2. Step 2: Convert to fraction form
    13,746.36/18,971.82 = 8,157.72/x
  3. Step 3: Cross multiply
    13,746.36x = 18,971.82 × 8,157.72
  4. Step 4: Simplify right side
    13,746.36x = 154,766,795.45
  5. Step 5: Solve for x
    x = 154,766,795.45/13,746.36
  6. Step 6: Final answer
    x = 11,258.75

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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.