Home / 20,950.32-28,918.22-13,416.94

Finding the Fourth Proportional to 20,950.32, 28,918.22 and 13,416.94

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Solution

The fourth proportional to 20,950.32, 28,918.22 and 13,416.94 is: 18,519.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,950.32 : 28,918.22 = 13,416.94 : x
  2. Step 2: Convert to fraction form
    20,950.32/28,918.22 = 13,416.94/x
  3. Step 3: Cross multiply
    20,950.32x = 28,918.22 × 13,416.94
  4. Step 4: Simplify right side
    20,950.32x = 387,993,991.71
  5. Step 5: Solve for x
    x = 387,993,991.71/20,950.32
  6. Step 6: Final answer
    x = 18,519.72

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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.