Home / 11,420.63-15,761.21-6,384.87

Finding the Fourth Proportional to 11,420.63, 15,761.21 and 6,384.87

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Solution

The fourth proportional to 11,420.63, 15,761.21 and 6,384.87 is: 8,811.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,420.63 : 15,761.21 = 6,384.87 : x
  2. Step 2: Convert to fraction form
    11,420.63/15,761.21 = 6,384.87/x
  3. Step 3: Cross multiply
    11,420.63x = 15,761.21 × 6,384.87
  4. Step 4: Simplify right side
    11,420.63x = 100,633,276.89
  5. Step 5: Solve for x
    x = 100,633,276.89/11,420.63
  6. Step 6: Final answer
    x = 8,811.53

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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.