Home / 39,040.21-53,875.66-21,135.21

Finding the Fourth Proportional to 39,040.21, 53,875.66 and 21,135.21

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Solution

The fourth proportional to 39,040.21, 53,875.66 and 21,135.21 is: 29,166.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,040.21 : 53,875.66 = 21,135.21 : x
  2. Step 2: Convert to fraction form
    39,040.21/53,875.66 = 21,135.21/x
  3. Step 3: Cross multiply
    39,040.21x = 53,875.66 × 21,135.21
  4. Step 4: Simplify right side
    39,040.21x = 1,138,673,387.99
  5. Step 5: Solve for x
    x = 1,138,673,387.99/39,040.21
  6. Step 6: Final answer
    x = 29,166.68

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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.