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Finding the Fourth Proportional to 39,137.80, 54,010.12 and 21,232.80

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Solution

The fourth proportional to 39,137.80, 54,010.12 and 21,232.80 is: 29,301.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,137.80 : 54,010.12 = 21,232.80 : x
  2. Step 2: Convert to fraction form
    39,137.80/54,010.12 = 21,232.80/x
  3. Step 3: Cross multiply
    39,137.80x = 54,010.12 × 21,232.80
  4. Step 4: Simplify right side
    39,137.80x = 1,146,786,075.94
  5. Step 5: Solve for x
    x = 1,146,786,075.94/39,137.80
  6. Step 6: Final answer
    x = 29,301.24

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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.