Home / 20,936.76-28,888.68-11,987.04

Finding the Fourth Proportional to 20,936.76, 28,888.68 and 11,987.04

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Solution

The fourth proportional to 20,936.76, 28,888.68 and 11,987.04 is: 16,539.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,936.76 : 28,888.68 = 11,987.04 : x
  2. Step 2: Convert to fraction form
    20,936.76/28,888.68 = 11,987.04/x
  3. Step 3: Cross multiply
    20,936.76x = 28,888.68 × 11,987.04
  4. Step 4: Simplify right side
    20,936.76x = 346,289,762.71
  5. Step 5: Solve for x
    x = 346,289,762.71/20,936.76
  6. Step 6: Final answer
    x = 16,539.80

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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.