Home / 28,921.36-39,911.20-16,174.40

Finding the Fourth Proportional to 28,921.36, 39,911.20 and 16,174.40

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Solution

The fourth proportional to 28,921.36, 39,911.20 and 16,174.40 is: 22,320.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,921.36 : 39,911.20 = 16,174.40 : x
  2. Step 2: Convert to fraction form
    28,921.36/39,911.20 = 16,174.40/x
  3. Step 3: Cross multiply
    28,921.36x = 39,911.20 × 16,174.40
  4. Step 4: Simplify right side
    28,921.36x = 645,539,672.84
  5. Step 5: Solve for x
    x = 645,539,672.84/28,921.36
  6. Step 6: Final answer
    x = 22,320.51

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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.