Home / 31,430.08-43,382.72-18,692.23

Finding the Fourth Proportional to 31,430.08, 43,382.72 and 18,692.23

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Solution

The fourth proportional to 31,430.08, 43,382.72 and 18,692.23 is: 25,800.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,430.08 : 43,382.72 = 18,692.23 : x
  2. Step 2: Convert to fraction form
    31,430.08/43,382.72 = 18,692.23/x
  3. Step 3: Cross multiply
    31,430.08x = 43,382.72 × 18,692.23
  4. Step 4: Simplify right side
    31,430.08x = 810,919,780.27
  5. Step 5: Solve for x
    x = 810,919,780.27/31,430.08
  6. Step 6: Final answer
    x = 25,800.75

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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.