Home / 11,426.58-15,768.61-6,390.78

Finding the Fourth Proportional to 11,426.58, 15,768.61 and 6,390.78

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Solution

The fourth proportional to 11,426.58, 15,768.61 and 6,390.78 is: 8,819.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,426.58 : 15,768.61 = 6,390.78 : x
  2. Step 2: Convert to fraction form
    11,426.58/15,768.61 = 6,390.78/x
  3. Step 3: Cross multiply
    11,426.58x = 15,768.61 × 6,390.78
  4. Step 4: Simplify right side
    11,426.58x = 100,773,642.31
  5. Step 5: Solve for x
    x = 100,773,642.31/11,426.58
  6. Step 6: Final answer
    x = 8,819.23

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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.