Home / 2,916.52-4,021.72-2,169.28

Finding the Fourth Proportional to 2,916.52, 4,021.72 and 2,169.28

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Solution

The fourth proportional to 2,916.52, 4,021.72 and 2,169.28 is: 2,991.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,916.52 : 4,021.72 = 2,169.28 : x
  2. Step 2: Convert to fraction form
    2,916.52/4,021.72 = 2,169.28/x
  3. Step 3: Cross multiply
    2,916.52x = 4,021.72 × 2,169.28
  4. Step 4: Simplify right side
    2,916.52x = 8,724,236.76
  5. Step 5: Solve for x
    x = 8,724,236.76/2,916.52
  6. Step 6: Final answer
    x = 2,991.32

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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.