Home / 2,987.84-4,123.27-1,661.55

Finding the Fourth Proportional to 2,987.84, 4,123.27 and 1,661.55

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Solution

The fourth proportional to 2,987.84, 4,123.27 and 1,661.55 is: 2,292.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.84 : 4,123.27 = 1,661.55 : x
  2. Step 2: Convert to fraction form
    2,987.84/4,123.27 = 1,661.55/x
  3. Step 3: Cross multiply
    2,987.84x = 4,123.27 × 1,661.55
  4. Step 4: Simplify right side
    2,987.84x = 6,851,005.88
  5. Step 5: Solve for x
    x = 6,851,005.88/2,987.84
  6. Step 6: Final answer
    x = 2,292.96

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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.