Home / 13,939.87-19,236.57-7,971.43

Finding the Fourth Proportional to 13,939.87, 19,236.57 and 7,971.43

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Solution

The fourth proportional to 13,939.87, 19,236.57 and 7,971.43 is: 11,000.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,939.87 : 19,236.57 = 7,971.43 : x
  2. Step 2: Convert to fraction form
    13,939.87/19,236.57 = 7,971.43/x
  3. Step 3: Cross multiply
    13,939.87x = 19,236.57 × 7,971.43
  4. Step 4: Simplify right side
    13,939.87x = 153,342,971.20
  5. Step 5: Solve for x
    x = 153,342,971.20/13,939.87
  6. Step 6: Final answer
    x = 11,000.32

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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.