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Finding the Fourth Proportional to 39,160.70, 58,751.06 and 12,865.67

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Solution

The fourth proportional to 39,160.70, 58,751.06 and 12,865.67 is: 19,301.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,160.70 : 58,751.06 = 12,865.67 : x
  2. Step 2: Convert to fraction form
    39,160.70/58,751.06 = 12,865.67/x
  3. Step 3: Cross multiply
    39,160.70x = 58,751.06 × 12,865.67
  4. Step 4: Simplify right side
    39,160.70x = 755,871,392.03
  5. Step 5: Solve for x
    x = 755,871,392.03/39,160.70
  6. Step 6: Final answer
    x = 19,301.79

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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.