Home / 39,288.47-54,218.09-21,383.61

Finding the Fourth Proportional to 39,288.47, 54,218.09 and 21,383.61

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Solution

The fourth proportional to 39,288.47, 54,218.09 and 21,383.61 is: 29,509.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,288.47 : 54,218.09 = 21,383.61 : x
  2. Step 2: Convert to fraction form
    39,288.47/54,218.09 = 21,383.61/x
  3. Step 3: Cross multiply
    39,288.47x = 54,218.09 × 21,383.61
  4. Step 4: Simplify right side
    39,288.47x = 1,159,378,113.50
  5. Step 5: Solve for x
    x = 1,159,378,113.50/39,288.47
  6. Step 6: Final answer
    x = 29,509.38

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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.