Home / 20,619.12-28,433.52-18,343.32

Finding the Fourth Proportional to 20,619.12, 28,433.52 and 18,343.32

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Solution

The fourth proportional to 20,619.12, 28,433.52 and 18,343.32 is: 25,295.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,619.12 : 28,433.52 = 18,343.32 : x
  2. Step 2: Convert to fraction form
    20,619.12/28,433.52 = 18,343.32/x
  3. Step 3: Cross multiply
    20,619.12x = 28,433.52 × 18,343.32
  4. Step 4: Simplify right side
    20,619.12x = 521,565,156.09
  5. Step 5: Solve for x
    x = 521,565,156.09/20,619.12
  6. Step 6: Final answer
    x = 25,295.22

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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.