Home / 20,448.04-28,236.78-12,907.72

Finding the Fourth Proportional to 20,448.04, 28,236.78 and 12,907.72

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Solution

The fourth proportional to 20,448.04, 28,236.78 and 12,907.72 is: 17,824.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,448.04 : 28,236.78 = 12,907.72 : x
  2. Step 2: Convert to fraction form
    20,448.04/28,236.78 = 12,907.72/x
  3. Step 3: Cross multiply
    20,448.04x = 28,236.78 × 12,907.72
  4. Step 4: Simplify right side
    20,448.04x = 364,472,449.94
  5. Step 5: Solve for x
    x = 364,472,449.94/20,448.04
  6. Step 6: Final answer
    x = 17,824.32

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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.