Home / 20,127.42-27,779.78-12,854.84

Finding the Fourth Proportional to 20,127.42, 27,779.78 and 12,854.84

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Solution

The fourth proportional to 20,127.42, 27,779.78 and 12,854.84 is: 17,742.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,127.42 : 27,779.78 = 12,854.84 : x
  2. Step 2: Convert to fraction form
    20,127.42/27,779.78 = 12,854.84/x
  3. Step 3: Cross multiply
    20,127.42x = 27,779.78 × 12,854.84
  4. Step 4: Simplify right side
    20,127.42x = 357,104,627.14
  5. Step 5: Solve for x
    x = 357,104,627.14/20,127.42
  6. Step 6: Final answer
    x = 17,742.20

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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.