Home / 3,925.80-5,417.70-2,157.44

Finding the Fourth Proportional to 3,925.80, 5,417.70 and 2,157.44

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Solution

The fourth proportional to 3,925.80, 5,417.70 and 2,157.44 is: 2,977.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,925.80 : 5,417.70 = 2,157.44 : x
  2. Step 2: Convert to fraction form
    3,925.80/5,417.70 = 2,157.44/x
  3. Step 3: Cross multiply
    3,925.80x = 5,417.70 × 2,157.44
  4. Step 4: Simplify right side
    3,925.80x = 11,688,362.69
  5. Step 5: Solve for x
    x = 11,688,362.69/3,925.80
  6. Step 6: Final answer
    x = 2,977.32

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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.