Home / 30,558.75-42,157.71-21,613.92

Finding the Fourth Proportional to 30,558.75, 42,157.71 and 21,613.92

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Solution

The fourth proportional to 30,558.75, 42,157.71 and 21,613.92 is: 29,817.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,558.75 : 42,157.71 = 21,613.92 : x
  2. Step 2: Convert to fraction form
    30,558.75/42,157.71 = 21,613.92/x
  3. Step 3: Cross multiply
    30,558.75x = 42,157.71 × 21,613.92
  4. Step 4: Simplify right side
    30,558.75x = 911,193,371.32
  5. Step 5: Solve for x
    x = 911,193,371.32/30,558.75
  6. Step 6: Final answer
    x = 29,817.76

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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.