Home / 15,709.45-21,678.48-8,635.82

Finding the Fourth Proportional to 15,709.45, 21,678.48 and 8,635.82

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Solution

The fourth proportional to 15,709.45, 21,678.48 and 8,635.82 is: 11,917.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,709.45 : 21,678.48 = 8,635.82 : x
  2. Step 2: Convert to fraction form
    15,709.45/21,678.48 = 8,635.82/x
  3. Step 3: Cross multiply
    15,709.45x = 21,678.48 × 8,635.82
  4. Step 4: Simplify right side
    15,709.45x = 187,211,342.76
  5. Step 5: Solve for x
    x = 187,211,342.76/15,709.45
  6. Step 6: Final answer
    x = 11,917.12

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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.