Home / 21,054.24-29,180.40-20,660.64

Finding the Fourth Proportional to 21,054.24, 29,180.40 and 20,660.64

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Solution

The fourth proportional to 21,054.24, 29,180.40 and 20,660.64 is: 28,634.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,054.24 : 29,180.40 = 20,660.64 : x
  2. Step 2: Convert to fraction form
    21,054.24/29,180.40 = 20,660.64/x
  3. Step 3: Cross multiply
    21,054.24x = 29,180.40 × 20,660.64
  4. Step 4: Simplify right side
    21,054.24x = 602,885,739.46
  5. Step 5: Solve for x
    x = 602,885,739.46/21,054.24
  6. Step 6: Final answer
    x = 28,634.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.