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Finding the Fourth Proportional to 9,989.72, 13,787.08 and 6,012.98

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Solution

The fourth proportional to 9,989.72, 13,787.08 and 6,012.98 is: 8,298.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,989.72 : 13,787.08 = 6,012.98 : x
  2. Step 2: Convert to fraction form
    9,989.72/13,787.08 = 6,012.98/x
  3. Step 3: Cross multiply
    9,989.72x = 13,787.08 × 6,012.98
  4. Step 4: Simplify right side
    9,989.72x = 82,901,352.33
  5. Step 5: Solve for x
    x = 82,901,352.33/9,989.72
  6. Step 6: Final answer
    x = 8,298.67

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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.