Home / 27,776.12-38,303.04-20,986.86

Finding the Fourth Proportional to 27,776.12, 38,303.04 and 20,986.86

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Solution

The fourth proportional to 27,776.12, 38,303.04 and 20,986.86 is: 28,940.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,776.12 : 38,303.04 = 20,986.86 : x
  2. Step 2: Convert to fraction form
    27,776.12/38,303.04 = 20,986.86/x
  3. Step 3: Cross multiply
    27,776.12x = 38,303.04 × 20,986.86
  4. Step 4: Simplify right side
    27,776.12x = 803,860,538.05
  5. Step 5: Solve for x
    x = 803,860,538.05/27,776.12
  6. Step 6: Final answer
    x = 28,940.71

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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.