Home / 13,172.12-18,177.48-7,122.32

Finding the Fourth Proportional to 13,172.12, 18,177.48 and 7,122.32

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Solution

The fourth proportional to 13,172.12, 18,177.48 and 7,122.32 is: 9,828.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,172.12 : 18,177.48 = 7,122.32 : x
  2. Step 2: Convert to fraction form
    13,172.12/18,177.48 = 7,122.32/x
  3. Step 3: Cross multiply
    13,172.12x = 18,177.48 × 7,122.32
  4. Step 4: Simplify right side
    13,172.12x = 129,465,797.35
  5. Step 5: Solve for x
    x = 129,465,797.35/13,172.12
  6. Step 6: Final answer
    x = 9,828.78

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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.