Home / 12,638.70-18,955.58-4,739.67

Finding the Fourth Proportional to 12,638.70, 18,955.58 and 4,739.67

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Solution

The fourth proportional to 12,638.70, 18,955.58 and 4,739.67 is: 7,108.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,638.70 : 18,955.58 = 4,739.67 : x
  2. Step 2: Convert to fraction form
    12,638.70/18,955.58 = 4,739.67/x
  3. Step 3: Cross multiply
    12,638.70x = 18,955.58 × 4,739.67
  4. Step 4: Simplify right side
    12,638.70x = 89,843,170.16
  5. Step 5: Solve for x
    x = 89,843,170.16/12,638.70
  6. Step 6: Final answer
    x = 7,108.58

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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.