Home / 11,171.28-15,419.16-7,639.32

Finding the Fourth Proportional to 11,171.28, 15,419.16 and 7,639.32

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Solution

The fourth proportional to 11,171.28, 15,419.16 and 7,639.32 is: 10,544.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,171.28 : 15,419.16 = 7,639.32 : x
  2. Step 2: Convert to fraction form
    11,171.28/15,419.16 = 7,639.32/x
  3. Step 3: Cross multiply
    11,171.28x = 15,419.16 × 7,639.32
  4. Step 4: Simplify right side
    11,171.28x = 117,791,897.37
  5. Step 5: Solve for x
    x = 117,791,897.37/11,171.28
  6. Step 6: Final answer
    x = 10,544.17

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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.