Home / 28,619.32-39,489.06-15,871.99

Finding the Fourth Proportional to 28,619.32, 39,489.06 and 15,871.99

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Solution

The fourth proportional to 28,619.32, 39,489.06 and 15,871.99 is: 21,900.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,619.32 : 39,489.06 = 15,871.99 : x
  2. Step 2: Convert to fraction form
    28,619.32/39,489.06 = 15,871.99/x
  3. Step 3: Cross multiply
    28,619.32x = 39,489.06 × 15,871.99
  4. Step 4: Simplify right side
    28,619.32x = 626,769,965.43
  5. Step 5: Solve for x
    x = 626,769,965.43/28,619.32
  6. Step 6: Final answer
    x = 21,900.24

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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.