Home / 39,726.80-54,819.72-21,820.88

Finding the Fourth Proportional to 39,726.80, 54,819.72 and 21,820.88

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Solution

The fourth proportional to 39,726.80, 54,819.72 and 21,820.88 is: 30,111.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,726.80 : 54,819.72 = 21,820.88 : x
  2. Step 2: Convert to fraction form
    39,726.80/54,819.72 = 21,820.88/x
  3. Step 3: Cross multiply
    39,726.80x = 54,819.72 × 21,820.88
  4. Step 4: Simplify right side
    39,726.80x = 1,196,214,531.75
  5. Step 5: Solve for x
    x = 1,196,214,531.75/39,726.80
  6. Step 6: Final answer
    x = 30,111.02

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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.