Home / 31,314.80-43,211.40-18,739.28

Finding the Fourth Proportional to 31,314.80, 43,211.40 and 18,739.28

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Solution

The fourth proportional to 31,314.80, 43,211.40 and 18,739.28 is: 25,858.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,314.80 : 43,211.40 = 18,739.28 : x
  2. Step 2: Convert to fraction form
    31,314.80/43,211.40 = 18,739.28/x
  3. Step 3: Cross multiply
    31,314.80x = 43,211.40 × 18,739.28
  4. Step 4: Simplify right side
    31,314.80x = 809,750,523.79
  5. Step 5: Solve for x
    x = 809,750,523.79/31,314.80
  6. Step 6: Final answer
    x = 25,858.40

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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.