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Finding the Fourth Proportional to 11,355, 15,671.93 and 10,856.85

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Solution

The fourth proportional to 11,355, 15,671.93 and 10,856.85 is: 14,984.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,355 : 15,671.93 = 10,856.85 : x
  2. Step 2: Convert to fraction form
    11,355/15,671.93 = 10,856.85/x
  3. Step 3: Cross multiply
    11,355x = 15,671.93 × 10,856.85
  4. Step 4: Simplify right side
    11,355x = 170,147,738.94
  5. Step 5: Solve for x
    x = 170,147,738.94/11,355
  6. Step 6: Final answer
    x = 14,984.39

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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.