Home / 28,555.64-39,405.93-15,809.34

Finding the Fourth Proportional to 28,555.64, 39,405.93 and 15,809.34

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Solution

The fourth proportional to 28,555.64, 39,405.93 and 15,809.34 is: 21,816.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,555.64 : 39,405.93 = 15,809.34 : x
  2. Step 2: Convert to fraction form
    28,555.64/39,405.93 = 15,809.34/x
  3. Step 3: Cross multiply
    28,555.64x = 39,405.93 × 15,809.34
  4. Step 4: Simplify right side
    28,555.64x = 622,981,833.87
  5. Step 5: Solve for x
    x = 622,981,833.87/28,555.64
  6. Step 6: Final answer
    x = 21,816.42

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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.