Home / 20,907.18-28,842.21-13,349.66

Finding the Fourth Proportional to 20,907.18, 28,842.21 and 13,349.66

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Solution

The fourth proportional to 20,907.18, 28,842.21 and 13,349.66 is: 18,416.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,907.18 : 28,842.21 = 13,349.66 : x
  2. Step 2: Convert to fraction form
    20,907.18/28,842.21 = 13,349.66/x
  3. Step 3: Cross multiply
    20,907.18x = 28,842.21 × 13,349.66
  4. Step 4: Simplify right side
    20,907.18x = 385,033,552.94
  5. Step 5: Solve for x
    x = 385,033,552.94/20,907.18
  6. Step 6: Final answer
    x = 18,416.33

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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.