Home / 2,987.98-4,124.54-1,992.89

Finding the Fourth Proportional to 2,987.98, 4,124.54 and 1,992.89

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Solution

The fourth proportional to 2,987.98, 4,124.54 and 1,992.89 is: 2,750.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.98 : 4,124.54 = 1,992.89 : x
  2. Step 2: Convert to fraction form
    2,987.98/4,124.54 = 1,992.89/x
  3. Step 3: Cross multiply
    2,987.98x = 4,124.54 × 1,992.89
  4. Step 4: Simplify right side
    2,987.98x = 8,219,769.81
  5. Step 5: Solve for x
    x = 8,219,769.81/2,987.98
  6. Step 6: Final answer
    x = 2,750.95

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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.