Home / 2,887.55-3,984.84-1,561.25

Finding the Fourth Proportional to 2,887.55, 3,984.84 and 1,561.25

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Solution

The fourth proportional to 2,887.55, 3,984.84 and 1,561.25 is: 2,154.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,887.55 : 3,984.84 = 1,561.25 : x
  2. Step 2: Convert to fraction form
    2,887.55/3,984.84 = 1,561.25/x
  3. Step 3: Cross multiply
    2,887.55x = 3,984.84 × 1,561.25
  4. Step 4: Simplify right side
    2,887.55x = 6,221,303.72
  5. Step 5: Solve for x
    x = 6,221,303.72/2,887.55
  6. Step 6: Final answer
    x = 2,154.53

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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.