Home / 20,420.03-30,619.18-7,089.65

Finding the Fourth Proportional to 20,420.03, 30,619.18 and 7,089.65

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Solution

The fourth proportional to 20,420.03, 30,619.18 and 7,089.65 is: 10,630.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,420.03 : 30,619.18 = 7,089.65 : x
  2. Step 2: Convert to fraction form
    20,420.03/30,619.18 = 7,089.65/x
  3. Step 3: Cross multiply
    20,420.03x = 30,619.18 × 7,089.65
  4. Step 4: Simplify right side
    20,420.03x = 217,079,412.31
  5. Step 5: Solve for x
    x = 217,079,412.31/20,420.03
  6. Step 6: Final answer
    x = 10,630.71

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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.