Home / 20,400.77-28,152.39-11,448.42

Finding the Fourth Proportional to 20,400.77, 28,152.39 and 11,448.42

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Solution

The fourth proportional to 20,400.77, 28,152.39 and 11,448.42 is: 15,798.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,400.77 : 28,152.39 = 11,448.42 : x
  2. Step 2: Convert to fraction form
    20,400.77/28,152.39 = 11,448.42/x
  3. Step 3: Cross multiply
    20,400.77x = 28,152.39 × 11,448.42
  4. Step 4: Simplify right side
    20,400.77x = 322,300,322.08
  5. Step 5: Solve for x
    x = 322,300,322.08/20,400.77
  6. Step 6: Final answer
    x = 15,798.44

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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.