Home / 20,162.81-27,779.30-15,119.15

Finding the Fourth Proportional to 20,162.81, 27,779.30 and 15,119.15

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Solution

The fourth proportional to 20,162.81, 27,779.30 and 15,119.15 is: 20,830.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,162.81 : 27,779.30 = 15,119.15 : x
  2. Step 2: Convert to fraction form
    20,162.81/27,779.30 = 15,119.15/x
  3. Step 3: Cross multiply
    20,162.81x = 27,779.30 × 15,119.15
  4. Step 4: Simplify right side
    20,162.81x = 419,999,189.10
  5. Step 5: Solve for x
    x = 419,999,189.10/20,162.81
  6. Step 6: Final answer
    x = 20,830.39

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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.