Home / 4,985.72-6,880-2,889.80

Finding the Fourth Proportional to 4,985.72, 6,880 and 2,889.80

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Solution

The fourth proportional to 4,985.72, 6,880 and 2,889.80 is: 3,987.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,985.72 : 6,880 = 2,889.80 : x
  2. Step 2: Convert to fraction form
    4,985.72/6,880 = 2,889.80/x
  3. Step 3: Cross multiply
    4,985.72x = 6,880 × 2,889.80
  4. Step 4: Simplify right side
    4,985.72x = 19,881,824
  5. Step 5: Solve for x
    x = 19,881,824/4,985.72
  6. Step 6: Final answer
    x = 3,987.75

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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.