Home / 2,953.35-4,073.20-2,155.78

Finding the Fourth Proportional to 2,953.35, 4,073.20 and 2,155.78

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Solution

The fourth proportional to 2,953.35, 4,073.20 and 2,155.78 is: 2,973.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,953.35 : 4,073.20 = 2,155.78 : x
  2. Step 2: Convert to fraction form
    2,953.35/4,073.20 = 2,155.78/x
  3. Step 3: Cross multiply
    2,953.35x = 4,073.20 × 2,155.78
  4. Step 4: Simplify right side
    2,953.35x = 8,780,923.10
  5. Step 5: Solve for x
    x = 8,780,923.10/2,953.35
  6. Step 6: Final answer
    x = 2,973.21

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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.