Home / 39,782.54-54,900.10-21,878.68

Finding the Fourth Proportional to 39,782.54, 54,900.10 and 21,878.68

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Solution

The fourth proportional to 39,782.54, 54,900.10 and 21,878.68 is: 30,192.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,782.54 : 54,900.10 = 21,878.68 : x
  2. Step 2: Convert to fraction form
    39,782.54/54,900.10 = 21,878.68/x
  3. Step 3: Cross multiply
    39,782.54x = 54,900.10 × 21,878.68
  4. Step 4: Simplify right side
    39,782.54x = 1,201,141,719.87
  5. Step 5: Solve for x
    x = 1,201,141,719.87/39,782.54
  6. Step 6: Final answer
    x = 30,192.69

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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.