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Finding the Fourth Proportional to 10,916.22, 15,048.46 and 8,679

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Solution

The fourth proportional to 10,916.22, 15,048.46 and 8,679 is: 11,964.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,916.22 : 15,048.46 = 8,679 : x
  2. Step 2: Convert to fraction form
    10,916.22/15,048.46 = 8,679/x
  3. Step 3: Cross multiply
    10,916.22x = 15,048.46 × 8,679
  4. Step 4: Simplify right side
    10,916.22x = 130,605,584.34
  5. Step 5: Solve for x
    x = 130,605,584.34/10,916.22
  6. Step 6: Final answer
    x = 11,964.36

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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.