Home / 15,511.86-21,407.76-8,797.77

Finding the Fourth Proportional to 15,511.86, 21,407.76 and 8,797.77

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Solution

The fourth proportional to 15,511.86, 21,407.76 and 8,797.77 is: 12,141.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,511.86 : 21,407.76 = 8,797.77 : x
  2. Step 2: Convert to fraction form
    15,511.86/21,407.76 = 8,797.77/x
  3. Step 3: Cross multiply
    15,511.86x = 21,407.76 × 8,797.77
  4. Step 4: Simplify right side
    15,511.86x = 188,340,548.70
  5. Step 5: Solve for x
    x = 188,340,548.70/15,511.86
  6. Step 6: Final answer
    x = 12,141.71

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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.