Home / 3,191.16-4,390.80-3,117.48

Finding the Fourth Proportional to 3,191.16, 4,390.80 and 3,117.48

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Solution

The fourth proportional to 3,191.16, 4,390.80 and 3,117.48 is: 4,289.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,191.16 : 4,390.80 = 3,117.48 : x
  2. Step 2: Convert to fraction form
    3,191.16/4,390.80 = 3,117.48/x
  3. Step 3: Cross multiply
    3,191.16x = 4,390.80 × 3,117.48
  4. Step 4: Simplify right side
    3,191.16x = 13,688,231.18
  5. Step 5: Solve for x
    x = 13,688,231.18/3,191.16
  6. Step 6: Final answer
    x = 4,289.42

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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.