Home / 39,720.58-54,815.06-21,817.24

Finding the Fourth Proportional to 39,720.58, 54,815.06 and 21,817.24

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Solution

The fourth proportional to 39,720.58, 54,815.06 and 21,817.24 is: 30,108.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,720.58 : 54,815.06 = 21,817.24 : x
  2. Step 2: Convert to fraction form
    39,720.58/54,815.06 = 21,817.24/x
  3. Step 3: Cross multiply
    39,720.58x = 54,815.06 × 21,817.24
  4. Step 4: Simplify right side
    39,720.58x = 1,195,913,319.63
  5. Step 5: Solve for x
    x = 1,195,913,319.63/39,720.58
  6. Step 6: Final answer
    x = 30,108.15

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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.