Home / 30,622.12-42,274.58-20,603.24

Finding the Fourth Proportional to 30,622.12, 42,274.58 and 20,603.24

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Solution

The fourth proportional to 30,622.12, 42,274.58 and 20,603.24 is: 28,443.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,622.12 : 42,274.58 = 20,603.24 : x
  2. Step 2: Convert to fraction form
    30,622.12/42,274.58 = 20,603.24/x
  3. Step 3: Cross multiply
    30,622.12x = 42,274.58 × 20,603.24
  4. Step 4: Simplify right side
    30,622.12x = 870,993,317.64
  5. Step 5: Solve for x
    x = 870,993,317.64/30,622.12
  6. Step 6: Final answer
    x = 28,443.27

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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.