Home / 28,571.78-42,885.36-13,791.08

Finding the Fourth Proportional to 28,571.78, 42,885.36 and 13,791.08

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Solution

The fourth proportional to 28,571.78, 42,885.36 and 13,791.08 is: 20,699.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,571.78 : 42,885.36 = 13,791.08 : x
  2. Step 2: Convert to fraction form
    28,571.78/42,885.36 = 13,791.08/x
  3. Step 3: Cross multiply
    28,571.78x = 42,885.36 × 13,791.08
  4. Step 4: Simplify right side
    28,571.78x = 591,435,216.16
  5. Step 5: Solve for x
    x = 591,435,216.16/28,571.78
  6. Step 6: Final answer
    x = 20,699.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.