Home / 11,146.40-15,380.52-7,172.84

Finding the Fourth Proportional to 11,146.40, 15,380.52 and 7,172.84

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Solution

The fourth proportional to 11,146.40, 15,380.52 and 7,172.84 is: 9,897.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,146.40 : 15,380.52 = 7,172.84 : x
  2. Step 2: Convert to fraction form
    11,146.40/15,380.52 = 7,172.84/x
  3. Step 3: Cross multiply
    11,146.40x = 15,380.52 × 7,172.84
  4. Step 4: Simplify right side
    11,146.40x = 110,322,009.08
  5. Step 5: Solve for x
    x = 110,322,009.08/11,146.40
  6. Step 6: Final answer
    x = 9,897.55

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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.