Home / 39,186.45-54,077.09-21,281.40

Finding the Fourth Proportional to 39,186.45, 54,077.09 and 21,281.40

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Solution

The fourth proportional to 39,186.45, 54,077.09 and 21,281.40 is: 29,368.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,186.45 : 54,077.09 = 21,281.40 : x
  2. Step 2: Convert to fraction form
    39,186.45/54,077.09 = 21,281.40/x
  3. Step 3: Cross multiply
    39,186.45x = 54,077.09 × 21,281.40
  4. Step 4: Simplify right side
    39,186.45x = 1,150,836,076.72
  5. Step 5: Solve for x
    x = 1,150,836,076.72/39,186.45
  6. Step 6: Final answer
    x = 29,368.21

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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.