Home / 20,515.90-30,779.04-5,724.81

Finding the Fourth Proportional to 20,515.90, 30,779.04 and 5,724.81

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Solution

The fourth proportional to 20,515.90, 30,779.04 and 5,724.81 is: 8,588.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,515.90 : 30,779.04 = 5,724.81 : x
  2. Step 2: Convert to fraction form
    20,515.90/30,779.04 = 5,724.81/x
  3. Step 3: Cross multiply
    20,515.90x = 30,779.04 × 5,724.81
  4. Step 4: Simplify right side
    20,515.90x = 176,204,155.98
  5. Step 5: Solve for x
    x = 176,204,155.98/20,515.90
  6. Step 6: Final answer
    x = 8,588.66

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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.