Home / 31,378.93-43,302.67-18,638.37

Finding the Fourth Proportional to 31,378.93, 43,302.67 and 18,638.37

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Solution

The fourth proportional to 31,378.93, 43,302.67 and 18,638.37 is: 25,720.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,378.93 : 43,302.67 = 18,638.37 : x
  2. Step 2: Convert to fraction form
    31,378.93/43,302.67 = 18,638.37/x
  3. Step 3: Cross multiply
    31,378.93x = 43,302.67 × 18,638.37
  4. Step 4: Simplify right side
    31,378.93x = 807,091,138.85
  5. Step 5: Solve for x
    x = 807,091,138.85/31,378.93
  6. Step 6: Final answer
    x = 25,720.80

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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.