Home / 20,280.42-27,985.16-11,326.68

Finding the Fourth Proportional to 20,280.42, 27,985.16 and 11,326.68

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Solution

The fourth proportional to 20,280.42, 27,985.16 and 11,326.68 is: 15,629.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,280.42 : 27,985.16 = 11,326.68 : x
  2. Step 2: Convert to fraction form
    20,280.42/27,985.16 = 11,326.68/x
  3. Step 3: Cross multiply
    20,280.42x = 27,985.16 × 11,326.68
  4. Step 4: Simplify right side
    20,280.42x = 316,978,895.44
  5. Step 5: Solve for x
    x = 316,978,895.44/20,280.42
  6. Step 6: Final answer
    x = 15,629.80

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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.