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Finding the Fourth Proportional to 28,555.44, 39,406.02 and 15,980.16

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Solution

The fourth proportional to 28,555.44, 39,406.02 and 15,980.16 is: 22,052.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,555.44 : 39,406.02 = 15,980.16 : x
  2. Step 2: Convert to fraction form
    28,555.44/39,406.02 = 15,980.16/x
  3. Step 3: Cross multiply
    28,555.44x = 39,406.02 × 15,980.16
  4. Step 4: Simplify right side
    28,555.44x = 629,714,504.56
  5. Step 5: Solve for x
    x = 629,714,504.56/28,555.44
  6. Step 6: Final answer
    x = 22,052.35

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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.