Home / 30,621.12-42,273.20-20,602.24

Finding the Fourth Proportional to 30,621.12, 42,273.20 and 20,602.24

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Solution

The fourth proportional to 30,621.12, 42,273.20 and 20,602.24 is: 28,441.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,621.12 : 42,273.20 = 20,602.24 : x
  2. Step 2: Convert to fraction form
    30,621.12/42,273.20 = 20,602.24/x
  3. Step 3: Cross multiply
    30,621.12x = 42,273.20 × 20,602.24
  4. Step 4: Simplify right side
    30,621.12x = 870,922,611.97
  5. Step 5: Solve for x
    x = 870,922,611.97/30,621.12
  6. Step 6: Final answer
    x = 28,441.89

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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.