Home / 11,426.72-15,768.75-6,390.87

Finding the Fourth Proportional to 11,426.72, 15,768.75 and 6,390.87

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Solution

The fourth proportional to 11,426.72, 15,768.75 and 6,390.87 is: 8,819.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,426.72 : 15,768.75 = 6,390.87 : x
  2. Step 2: Convert to fraction form
    11,426.72/15,768.75 = 6,390.87/x
  3. Step 3: Cross multiply
    11,426.72x = 15,768.75 × 6,390.87
  4. Step 4: Simplify right side
    11,426.72x = 100,776,031.31
  5. Step 5: Solve for x
    x = 100,776,031.31/11,426.72
  6. Step 6: Final answer
    x = 8,819.34

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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.