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Finding the Fourth Proportional to 11,915.44, 17,873.16 and 7,019.20

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Solution

The fourth proportional to 11,915.44, 17,873.16 and 7,019.20 is: 10,528.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,915.44 : 17,873.16 = 7,019.20 : x
  2. Step 2: Convert to fraction form
    11,915.44/17,873.16 = 7,019.20/x
  3. Step 3: Cross multiply
    11,915.44x = 17,873.16 × 7,019.20
  4. Step 4: Simplify right side
    11,915.44x = 125,455,284.67
  5. Step 5: Solve for x
    x = 125,455,284.67/11,915.44
  6. Step 6: Final answer
    x = 10,528.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.