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Finding the Fourth Proportional to 7,943.70, 11,915.55 and 2,750.10

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Solution

The fourth proportional to 7,943.70, 11,915.55 and 2,750.10 is: 4,125.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,943.70 : 11,915.55 = 2,750.10 : x
  2. Step 2: Convert to fraction form
    7,943.70/11,915.55 = 2,750.10/x
  3. Step 3: Cross multiply
    7,943.70x = 11,915.55 × 2,750.10
  4. Step 4: Simplify right side
    7,943.70x = 32,768,954.06
  5. Step 5: Solve for x
    x = 32,768,954.06/7,943.70
  6. Step 6: Final answer
    x = 4,125.15

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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.