Home / 2,117.95-2,921.16-1,855.51

Finding the Fourth Proportional to 2,117.95, 2,921.16 and 1,855.51

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Solution

The fourth proportional to 2,117.95, 2,921.16 and 1,855.51 is: 2,559.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,117.95 : 2,921.16 = 1,855.51 : x
  2. Step 2: Convert to fraction form
    2,117.95/2,921.16 = 1,855.51/x
  3. Step 3: Cross multiply
    2,117.95x = 2,921.16 × 1,855.51
  4. Step 4: Simplify right side
    2,117.95x = 5,420,241.25
  5. Step 5: Solve for x
    x = 5,420,241.25/2,117.95
  6. Step 6: Final answer
    x = 2,559.20

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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.