Home / 20,392.64-28,140.56-11,440.08

Finding the Fourth Proportional to 20,392.64, 28,140.56 and 11,440.08

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Solution

The fourth proportional to 20,392.64, 28,140.56 and 11,440.08 is: 15,786.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,392.64 : 28,140.56 = 11,440.08 : x
  2. Step 2: Convert to fraction form
    20,392.64/28,140.56 = 11,440.08/x
  3. Step 3: Cross multiply
    20,392.64x = 28,140.56 × 11,440.08
  4. Step 4: Simplify right side
    20,392.64x = 321,930,257.64
  5. Step 5: Solve for x
    x = 321,930,257.64/20,392.64
  6. Step 6: Final answer
    x = 15,786.59

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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.