Home / 20,678.85-30,999.51-7,521.92

Finding the Fourth Proportional to 20,678.85, 30,999.51 and 7,521.92

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Solution

The fourth proportional to 20,678.85, 30,999.51 and 7,521.92 is: 11,276.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,678.85 : 30,999.51 = 7,521.92 : x
  2. Step 2: Convert to fraction form
    20,678.85/30,999.51 = 7,521.92/x
  3. Step 3: Cross multiply
    20,678.85x = 30,999.51 × 7,521.92
  4. Step 4: Simplify right side
    20,678.85x = 233,175,796.65
  5. Step 5: Solve for x
    x = 233,175,796.65/20,678.85
  6. Step 6: Final answer
    x = 11,276.05

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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.