Home / 39,172.70-58,741.60-12,513.78

Finding the Fourth Proportional to 39,172.70, 58,741.60 and 12,513.78

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Solution

The fourth proportional to 39,172.70, 58,741.60 and 12,513.78 is: 18,765.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,172.70 : 58,741.60 = 12,513.78 : x
  2. Step 2: Convert to fraction form
    39,172.70/58,741.60 = 12,513.78/x
  3. Step 3: Cross multiply
    39,172.70x = 58,741.60 × 12,513.78
  4. Step 4: Simplify right side
    39,172.70x = 735,079,459.25
  5. Step 5: Solve for x
    x = 735,079,459.25/39,172.70
  6. Step 6: Final answer
    x = 18,765.10

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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.