Home / 11,427.57-15,770.34-6,391.98

Finding the Fourth Proportional to 11,427.57, 15,770.34 and 6,391.98

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Solution

The fourth proportional to 11,427.57, 15,770.34 and 6,391.98 is: 8,821.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,427.57 : 15,770.34 = 6,391.98 : x
  2. Step 2: Convert to fraction form
    11,427.57/15,770.34 = 6,391.98/x
  3. Step 3: Cross multiply
    11,427.57x = 15,770.34 × 6,391.98
  4. Step 4: Simplify right side
    11,427.57x = 100,803,697.87
  5. Step 5: Solve for x
    x = 100,803,697.87/11,427.57
  6. Step 6: Final answer
    x = 8,821.10

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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.