Home / 2,156.10-2,973.84-1,408.86

Finding the Fourth Proportional to 2,156.10, 2,973.84 and 1,408.86

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Solution

The fourth proportional to 2,156.10, 2,973.84 and 1,408.86 is: 1,943.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,156.10 : 2,973.84 = 1,408.86 : x
  2. Step 2: Convert to fraction form
    2,156.10/2,973.84 = 1,408.86/x
  3. Step 3: Cross multiply
    2,156.10x = 2,973.84 × 1,408.86
  4. Step 4: Simplify right side
    2,156.10x = 4,189,724.22
  5. Step 5: Solve for x
    x = 4,189,724.22/2,156.10
  6. Step 6: Final answer
    x = 1,943.20

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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.