Home / 20,405.99-28,153.03-13,336.51

Finding the Fourth Proportional to 20,405.99, 28,153.03 and 13,336.51

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Solution

The fourth proportional to 20,405.99, 28,153.03 and 13,336.51 is: 18,399.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,405.99 : 28,153.03 = 13,336.51 : x
  2. Step 2: Convert to fraction form
    20,405.99/28,153.03 = 13,336.51/x
  3. Step 3: Cross multiply
    20,405.99x = 28,153.03 × 13,336.51
  4. Step 4: Simplify right side
    20,405.99x = 375,463,166.13
  5. Step 5: Solve for x
    x = 375,463,166.13/20,405.99
  6. Step 6: Final answer
    x = 18,399.65

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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.