Home / 30,880.03-42,580.60-20,105.02

Finding the Fourth Proportional to 30,880.03, 42,580.60 and 20,105.02

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Solution

The fourth proportional to 30,880.03, 42,580.60 and 20,105.02 is: 27,722.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,880.03 : 42,580.60 = 20,105.02 : x
  2. Step 2: Convert to fraction form
    30,880.03/42,580.60 = 20,105.02/x
  3. Step 3: Cross multiply
    30,880.03x = 42,580.60 × 20,105.02
  4. Step 4: Simplify right side
    30,880.03x = 856,083,814.61
  5. Step 5: Solve for x
    x = 856,083,814.61/30,880.03
  6. Step 6: Final answer
    x = 27,722.89

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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.