Home / 30,968.15-42,742.83-20,358.77

Finding the Fourth Proportional to 30,968.15, 42,742.83 and 20,358.77

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Solution

The fourth proportional to 30,968.15, 42,742.83 and 20,358.77 is: 28,099.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,968.15 : 42,742.83 = 20,358.77 : x
  2. Step 2: Convert to fraction form
    30,968.15/42,742.83 = 20,358.77/x
  3. Step 3: Cross multiply
    30,968.15x = 42,742.83 × 20,358.77
  4. Step 4: Simplify right side
    30,968.15x = 870,191,231.40
  5. Step 5: Solve for x
    x = 870,191,231.40/30,968.15
  6. Step 6: Final answer
    x = 28,099.56

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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.