Home / 2,165.21-2,987.07-1,368.25

Finding the Fourth Proportional to 2,165.21, 2,987.07 and 1,368.25

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Solution

The fourth proportional to 2,165.21, 2,987.07 and 1,368.25 is: 1,887.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,165.21 : 2,987.07 = 1,368.25 : x
  2. Step 2: Convert to fraction form
    2,165.21/2,987.07 = 1,368.25/x
  3. Step 3: Cross multiply
    2,165.21x = 2,987.07 × 1,368.25
  4. Step 4: Simplify right side
    2,165.21x = 4,087,058.53
  5. Step 5: Solve for x
    x = 4,087,058.53/2,165.21
  6. Step 6: Final answer
    x = 1,887.60

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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.