Home / 39,726.70-54,821.38-21,820.64

Finding the Fourth Proportional to 39,726.70, 54,821.38 and 21,820.64

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Solution

The fourth proportional to 39,726.70, 54,821.38 and 21,820.64 is: 30,111.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,726.70 : 54,821.38 = 21,820.64 : x
  2. Step 2: Convert to fraction form
    39,726.70/54,821.38 = 21,820.64/x
  3. Step 3: Cross multiply
    39,726.70x = 54,821.38 × 21,820.64
  4. Step 4: Simplify right side
    39,726.70x = 1,196,237,488.18
  5. Step 5: Solve for x
    x = 1,196,237,488.18/39,726.70
  6. Step 6: Final answer
    x = 30,111.68

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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.