Home / 11,151.45-15,392.30-6,438.87

Finding the Fourth Proportional to 11,151.45, 15,392.30 and 6,438.87

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Solution

The fourth proportional to 11,151.45, 15,392.30 and 6,438.87 is: 8,887.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,151.45 : 15,392.30 = 6,438.87 : x
  2. Step 2: Convert to fraction form
    11,151.45/15,392.30 = 6,438.87/x
  3. Step 3: Cross multiply
    11,151.45x = 15,392.30 × 6,438.87
  4. Step 4: Simplify right side
    11,151.45x = 99,108,986.51
  5. Step 5: Solve for x
    x = 99,108,986.51/11,151.45
  6. Step 6: Final answer
    x = 8,887.54

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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.