Home / 11,426.12-15,768.42-6,390.20

Finding the Fourth Proportional to 11,426.12, 15,768.42 and 6,390.20

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Solution

The fourth proportional to 11,426.12, 15,768.42 and 6,390.20 is: 8,818.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,426.12 : 15,768.42 = 6,390.20 : x
  2. Step 2: Convert to fraction form
    11,426.12/15,768.42 = 6,390.20/x
  3. Step 3: Cross multiply
    11,426.12x = 15,768.42 × 6,390.20
  4. Step 4: Simplify right side
    11,426.12x = 100,763,357.48
  5. Step 5: Solve for x
    x = 100,763,357.48/11,426.12
  6. Step 6: Final answer
    x = 8,818.69

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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.