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Finding the Fourth Proportional to 7,915.99, 11,869.27 and 2,649.72

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Solution

The fourth proportional to 7,915.99, 11,869.27 and 2,649.72 is: 3,973.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,915.99 : 11,869.27 = 2,649.72 : x
  2. Step 2: Convert to fraction form
    7,915.99/11,869.27 = 2,649.72/x
  3. Step 3: Cross multiply
    7,915.99x = 11,869.27 × 2,649.72
  4. Step 4: Simplify right side
    7,915.99x = 31,450,235.48
  5. Step 5: Solve for x
    x = 31,450,235.48/7,915.99
  6. Step 6: Final answer
    x = 3,973.00

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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.