Home / 11,511.86-15,887.29-6,475.78

Finding the Fourth Proportional to 11,511.86, 15,887.29 and 6,475.78

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Solution

The fourth proportional to 11,511.86, 15,887.29 and 6,475.78 is: 8,937.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,511.86 : 15,887.29 = 6,475.78 : x
  2. Step 2: Convert to fraction form
    11,511.86/15,887.29 = 6,475.78/x
  3. Step 3: Cross multiply
    11,511.86x = 15,887.29 × 6,475.78
  4. Step 4: Simplify right side
    11,511.86x = 102,882,594.84
  5. Step 5: Solve for x
    x = 102,882,594.84/11,511.86
  6. Step 6: Final answer
    x = 8,937.10

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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.