Home / 28,261.86-38,980.35-19,764.42

Finding the Fourth Proportional to 28,261.86, 38,980.35 and 19,764.42

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Solution

The fourth proportional to 28,261.86, 38,980.35 and 19,764.42 is: 27,260.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,261.86 : 38,980.35 = 19,764.42 : x
  2. Step 2: Convert to fraction form
    28,261.86/38,980.35 = 19,764.42/x
  3. Step 3: Cross multiply
    28,261.86x = 38,980.35 × 19,764.42
  4. Step 4: Simplify right side
    28,261.86x = 770,424,009.15
  5. Step 5: Solve for x
    x = 770,424,009.15/28,261.86
  6. Step 6: Final answer
    x = 27,260.20

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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.