Home / 28,027.78-38,681.07-20,941.90

Finding the Fourth Proportional to 28,027.78, 38,681.07 and 20,941.90

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Solution

The fourth proportional to 28,027.78, 38,681.07 and 20,941.90 is: 28,901.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,027.78 : 38,681.07 = 20,941.90 : x
  2. Step 2: Convert to fraction form
    28,027.78/38,681.07 = 20,941.90/x
  3. Step 3: Cross multiply
    28,027.78x = 38,681.07 × 20,941.90
  4. Step 4: Simplify right side
    28,027.78x = 810,055,099.83
  5. Step 5: Solve for x
    x = 810,055,099.83/28,027.78
  6. Step 6: Final answer
    x = 28,901.86

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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.