Home / 39,289.14-54,220.17-21,385.30

Finding the Fourth Proportional to 39,289.14, 54,220.17 and 21,385.30

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Solution

The fourth proportional to 39,289.14, 54,220.17 and 21,385.30 is: 29,512.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,289.14 : 54,220.17 = 21,385.30 : x
  2. Step 2: Convert to fraction form
    39,289.14/54,220.17 = 21,385.30/x
  3. Step 3: Cross multiply
    39,289.14x = 54,220.17 × 21,385.30
  4. Step 4: Simplify right side
    39,289.14x = 1,159,514,601.50
  5. Step 5: Solve for x
    x = 1,159,514,601.50/39,289.14
  6. Step 6: Final answer
    x = 29,512.34

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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.