Home / 28,647.86-42,973.84-11,991.12

Finding the Fourth Proportional to 28,647.86, 42,973.84 and 11,991.12

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Solution

The fourth proportional to 28,647.86, 42,973.84 and 11,991.12 is: 17,987.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,647.86 : 42,973.84 = 11,991.12 : x
  2. Step 2: Convert to fraction form
    28,647.86/42,973.84 = 11,991.12/x
  3. Step 3: Cross multiply
    28,647.86x = 42,973.84 × 11,991.12
  4. Step 4: Simplify right side
    28,647.86x = 515,304,472.30
  5. Step 5: Solve for x
    x = 515,304,472.30/28,647.86
  6. Step 6: Final answer
    x = 17,987.54

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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.