Home / 28,311.40-39,112.10-18,643.83

Finding the Fourth Proportional to 28,311.40, 39,112.10 and 18,643.83

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Solution

The fourth proportional to 28,311.40, 39,112.10 and 18,643.83 is: 25,756.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,311.40 : 39,112.10 = 18,643.83 : x
  2. Step 2: Convert to fraction form
    28,311.40/39,112.10 = 18,643.83/x
  3. Step 3: Cross multiply
    28,311.40x = 39,112.10 × 18,643.83
  4. Step 4: Simplify right side
    28,311.40x = 729,199,527.03
  5. Step 5: Solve for x
    x = 729,199,527.03/28,311.40
  6. Step 6: Final answer
    x = 25,756.39

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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.