Home / 3,880.16-5,354.48-2,111.72

Finding the Fourth Proportional to 3,880.16, 5,354.48 and 2,111.72

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Solution

The fourth proportional to 3,880.16, 5,354.48 and 2,111.72 is: 2,914.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,880.16 : 5,354.48 = 2,111.72 : x
  2. Step 2: Convert to fraction form
    3,880.16/5,354.48 = 2,111.72/x
  3. Step 3: Cross multiply
    3,880.16x = 5,354.48 × 2,111.72
  4. Step 4: Simplify right side
    3,880.16x = 11,307,162.51
  5. Step 5: Solve for x
    x = 11,307,162.51/3,880.16
  6. Step 6: Final answer
    x = 2,914.10

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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.