Home / 39,859.12-55,005.98-21,954.68

Finding the Fourth Proportional to 39,859.12, 55,005.98 and 21,954.68

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Solution

The fourth proportional to 39,859.12, 55,005.98 and 21,954.68 is: 30,297.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,859.12 : 55,005.98 = 21,954.68 : x
  2. Step 2: Convert to fraction form
    39,859.12/55,005.98 = 21,954.68/x
  3. Step 3: Cross multiply
    39,859.12x = 55,005.98 × 21,954.68
  4. Step 4: Simplify right side
    39,859.12x = 1,207,638,688.99
  5. Step 5: Solve for x
    x = 1,207,638,688.99/39,859.12
  6. Step 6: Final answer
    x = 30,297.68

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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.