Home / 39,785.02-54,902.93-21,880.78

Finding the Fourth Proportional to 39,785.02, 54,902.93 and 21,880.78

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Solution

The fourth proportional to 39,785.02, 54,902.93 and 21,880.78 is: 30,195.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,785.02 : 54,902.93 = 21,880.78 : x
  2. Step 2: Convert to fraction form
    39,785.02/54,902.93 = 21,880.78/x
  3. Step 3: Cross multiply
    39,785.02x = 54,902.93 × 21,880.78
  4. Step 4: Simplify right side
    39,785.02x = 1,201,318,850.13
  5. Step 5: Solve for x
    x = 1,201,318,850.13/39,785.02
  6. Step 6: Final answer
    x = 30,195.26

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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.