Home / 13,138.77-18,132.00-7,474.03

Finding the Fourth Proportional to 13,138.77, 18,132.00 and 7,474.03

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Solution

The fourth proportional to 13,138.77, 18,132.00 and 7,474.03 is: 10,314.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,138.77 : 18,132.00 = 7,474.03 : x
  2. Step 2: Convert to fraction form
    13,138.77/18,132.00 = 7,474.03/x
  3. Step 3: Cross multiply
    13,138.77x = 18,132.00 × 7,474.03
  4. Step 4: Simplify right side
    13,138.77x = 135,519,208.13
  5. Step 5: Solve for x
    x = 135,519,208.13/13,138.77
  6. Step 6: Final answer
    x = 10,314.45

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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.