Home / 30,591.11-42,171.04-21,622.79

Finding the Fourth Proportional to 30,591.11, 42,171.04 and 21,622.79

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Solution

The fourth proportional to 30,591.11, 42,171.04 and 21,622.79 is: 29,807.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,591.11 : 42,171.04 = 21,622.79 : x
  2. Step 2: Convert to fraction form
    30,591.11/42,171.04 = 21,622.79/x
  3. Step 3: Cross multiply
    30,591.11x = 42,171.04 × 21,622.79
  4. Step 4: Simplify right side
    30,591.11x = 911,855,542.00
  5. Step 5: Solve for x
    x = 911,855,542.00/30,591.11
  6. Step 6: Final answer
    x = 29,807.86

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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.