Home / 25,728.80-35,464.64-21,004.96

Finding the Fourth Proportional to 25,728.80, 35,464.64 and 21,004.96

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Solution

The fourth proportional to 25,728.80, 35,464.64 and 21,004.96 is: 28,953.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,728.80 : 35,464.64 = 21,004.96 : x
  2. Step 2: Convert to fraction form
    25,728.80/35,464.64 = 21,004.96/x
  3. Step 3: Cross multiply
    25,728.80x = 35,464.64 × 21,004.96
  4. Step 4: Simplify right side
    25,728.80x = 744,933,344.61
  5. Step 5: Solve for x
    x = 744,933,344.61/25,728.80
  6. Step 6: Final answer
    x = 28,953.29

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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.