Home / 5,148.63-7,105.12-2,790.78

Finding the Fourth Proportional to 5,148.63, 7,105.12 and 2,790.78

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Solution

The fourth proportional to 5,148.63, 7,105.12 and 2,790.78 is: 3,851.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,148.63 : 7,105.12 = 2,790.78 : x
  2. Step 2: Convert to fraction form
    5,148.63/7,105.12 = 2,790.78/x
  3. Step 3: Cross multiply
    5,148.63x = 7,105.12 × 2,790.78
  4. Step 4: Simplify right side
    5,148.63x = 19,828,826.79
  5. Step 5: Solve for x
    x = 19,828,826.79/5,148.63
  6. Step 6: Final answer
    x = 3,851.28

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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.