Home / 11,915.64-16,429.56-9,670.44

Finding the Fourth Proportional to 11,915.64, 16,429.56 and 9,670.44

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Solution

The fourth proportional to 11,915.64, 16,429.56 and 9,670.44 is: 13,333.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,915.64 : 16,429.56 = 9,670.44 : x
  2. Step 2: Convert to fraction form
    11,915.64/16,429.56 = 9,670.44/x
  3. Step 3: Cross multiply
    11,915.64x = 16,429.56 × 9,670.44
  4. Step 4: Simplify right side
    11,915.64x = 158,881,074.21
  5. Step 5: Solve for x
    x = 158,881,074.21/11,915.64
  6. Step 6: Final answer
    x = 13,333.83

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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.