Home / 20,118.80-27,777.48-15,394.64

Finding the Fourth Proportional to 20,118.80, 27,777.48 and 15,394.64

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Solution

The fourth proportional to 20,118.80, 27,777.48 and 15,394.64 is: 21,254.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,118.80 : 27,777.48 = 15,394.64 : x
  2. Step 2: Convert to fraction form
    20,118.80/27,777.48 = 15,394.64/x
  3. Step 3: Cross multiply
    20,118.80x = 27,777.48 × 15,394.64
  4. Step 4: Simplify right side
    20,118.80x = 427,624,304.71
  5. Step 5: Solve for x
    x = 427,624,304.71/20,118.80
  6. Step 6: Final answer
    x = 21,254.96

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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.