Home / 39,636.90-54,697.77-21,731.58

Finding the Fourth Proportional to 39,636.90, 54,697.77 and 21,731.58

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Solution

The fourth proportional to 39,636.90, 54,697.77 and 21,731.58 is: 29,988.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,636.90 : 54,697.77 = 21,731.58 : x
  2. Step 2: Convert to fraction form
    39,636.90/54,697.77 = 21,731.58/x
  3. Step 3: Cross multiply
    39,636.90x = 54,697.77 × 21,731.58
  4. Step 4: Simplify right side
    39,636.90x = 1,188,668,964.58
  5. Step 5: Solve for x
    x = 1,188,668,964.58/39,636.90
  6. Step 6: Final answer
    x = 29,988.95

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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.