Home / 28,647.61-42,973.49-11,990.89

Finding the Fourth Proportional to 28,647.61, 42,973.49 and 11,990.89

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Solution

The fourth proportional to 28,647.61, 42,973.49 and 11,990.89 is: 17,987.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,647.61 : 42,973.49 = 11,990.89 : x
  2. Step 2: Convert to fraction form
    28,647.61/42,973.49 = 11,990.89/x
  3. Step 3: Cross multiply
    28,647.61x = 42,973.49 × 11,990.89
  4. Step 4: Simplify right side
    28,647.61x = 515,290,391.51
  5. Step 5: Solve for x
    x = 515,290,391.51/28,647.61
  6. Step 6: Final answer
    x = 17,987.20

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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.