Home / 13,155.14-18,157.75-8,120.18

Finding the Fourth Proportional to 13,155.14, 18,157.75 and 8,120.18

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Solution

The fourth proportional to 13,155.14, 18,157.75 and 8,120.18 is: 11,208.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,155.14 : 18,157.75 = 8,120.18 : x
  2. Step 2: Convert to fraction form
    13,155.14/18,157.75 = 8,120.18/x
  3. Step 3: Cross multiply
    13,155.14x = 18,157.75 × 8,120.18
  4. Step 4: Simplify right side
    13,155.14x = 147,444,087.31
  5. Step 5: Solve for x
    x = 147,444,087.31/13,155.14
  6. Step 6: Final answer
    x = 11,208.10

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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.