Home / 20,990.64-28,973.04-13,825.79

Finding the Fourth Proportional to 20,990.64, 28,973.04 and 13,825.79

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Solution

The fourth proportional to 20,990.64, 28,973.04 and 13,825.79 is: 19,083.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,990.64 : 28,973.04 = 13,825.79 : x
  2. Step 2: Convert to fraction form
    20,990.64/28,973.04 = 13,825.79/x
  3. Step 3: Cross multiply
    20,990.64x = 28,973.04 × 13,825.79
  4. Step 4: Simplify right side
    20,990.64x = 400,575,156.41
  5. Step 5: Solve for x
    x = 400,575,156.41/20,990.64
  6. Step 6: Final answer
    x = 19,083.51

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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.