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Finding the Fourth Proportional to 9,915.12, 14,883.48 and 5,240.88

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Solution

The fourth proportional to 9,915.12, 14,883.48 and 5,240.88 is: 7,867.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,915.12 : 14,883.48 = 5,240.88 : x
  2. Step 2: Convert to fraction form
    9,915.12/14,883.48 = 5,240.88/x
  3. Step 3: Cross multiply
    9,915.12x = 14,883.48 × 5,240.88
  4. Step 4: Simplify right side
    9,915.12x = 78,002,532.66
  5. Step 5: Solve for x
    x = 78,002,532.66/9,915.12
  6. Step 6: Final answer
    x = 7,867.03

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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.