Home / 5,151.70-7,109.40-2,913.60

Finding the Fourth Proportional to 5,151.70, 7,109.40 and 2,913.60

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Solution

The fourth proportional to 5,151.70, 7,109.40 and 2,913.60 is: 4,020.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,151.70 : 7,109.40 = 2,913.60 : x
  2. Step 2: Convert to fraction form
    5,151.70/7,109.40 = 2,913.60/x
  3. Step 3: Cross multiply
    5,151.70x = 7,109.40 × 2,913.60
  4. Step 4: Simplify right side
    5,151.70x = 20,713,947.84
  5. Step 5: Solve for x
    x = 20,713,947.84/5,151.70
  6. Step 6: Final answer
    x = 4,020.80

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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.