Home / 13,141.40-18,135.42-7,173.32

Finding the Fourth Proportional to 13,141.40, 18,135.42 and 7,173.32

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Solution

The fourth proportional to 13,141.40, 18,135.42 and 7,173.32 is: 9,899.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,141.40 : 18,135.42 = 7,173.32 : x
  2. Step 2: Convert to fraction form
    13,141.40/18,135.42 = 7,173.32/x
  3. Step 3: Cross multiply
    13,141.40x = 18,135.42 × 7,173.32
  4. Step 4: Simplify right side
    13,141.40x = 130,091,170.99
  5. Step 5: Solve for x
    x = 130,091,170.99/13,141.40
  6. Step 6: Final answer
    x = 9,899.34

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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.