Home / 2,901.58-4,005.12-2,155.30

Finding the Fourth Proportional to 2,901.58, 4,005.12 and 2,155.30

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Solution

The fourth proportional to 2,901.58, 4,005.12 and 2,155.30 is: 2,975.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,901.58 : 4,005.12 = 2,155.30 : x
  2. Step 2: Convert to fraction form
    2,901.58/4,005.12 = 2,155.30/x
  3. Step 3: Cross multiply
    2,901.58x = 4,005.12 × 2,155.30
  4. Step 4: Simplify right side
    2,901.58x = 8,632,235.14
  5. Step 5: Solve for x
    x = 8,632,235.14/2,901.58
  6. Step 6: Final answer
    x = 2,975.01

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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.