Home / 2,913.72-4,020.91-1,587.42

Finding the Fourth Proportional to 2,913.72, 4,020.91 and 1,587.42

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Solution

The fourth proportional to 2,913.72, 4,020.91 and 1,587.42 is: 2,190.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,913.72 : 4,020.91 = 1,587.42 : x
  2. Step 2: Convert to fraction form
    2,913.72/4,020.91 = 1,587.42/x
  3. Step 3: Cross multiply
    2,913.72x = 4,020.91 × 1,587.42
  4. Step 4: Simplify right side
    2,913.72x = 6,382,865.02
  5. Step 5: Solve for x
    x = 6,382,865.02/2,913.72
  6. Step 6: Final answer
    x = 2,190.63

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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.