Home / 20,691.81-30,977.87-18,555.23

Finding the Fourth Proportional to 20,691.81, 30,977.87 and 18,555.23

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Solution

The fourth proportional to 20,691.81, 30,977.87 and 18,555.23 is: 27,779.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,691.81 : 30,977.87 = 18,555.23 : x
  2. Step 2: Convert to fraction form
    20,691.81/30,977.87 = 18,555.23/x
  3. Step 3: Cross multiply
    20,691.81x = 30,977.87 × 18,555.23
  4. Step 4: Simplify right side
    20,691.81x = 574,801,502.76
  5. Step 5: Solve for x
    x = 574,801,502.76/20,691.81
  6. Step 6: Final answer
    x = 27,779.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.