Home / 39,785.15-54,902.40-21,880.16

Finding the Fourth Proportional to 39,785.15, 54,902.40 and 21,880.16

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Solution

The fourth proportional to 39,785.15, 54,902.40 and 21,880.16 is: 30,194.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,785.15 : 54,902.40 = 21,880.16 : x
  2. Step 2: Convert to fraction form
    39,785.15/54,902.40 = 21,880.16/x
  3. Step 3: Cross multiply
    39,785.15x = 54,902.40 × 21,880.16
  4. Step 4: Simplify right side
    39,785.15x = 1,201,273,021.87
  5. Step 5: Solve for x
    x = 1,201,273,021.87/39,785.15
  6. Step 6: Final answer
    x = 30,194.01

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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.