Home / 21,336.91-29,442.69-12,382.67

Finding the Fourth Proportional to 21,336.91, 29,442.69 and 12,382.67

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Solution

The fourth proportional to 21,336.91, 29,442.69 and 12,382.67 is: 17,086.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,336.91 : 29,442.69 = 12,382.67 : x
  2. Step 2: Convert to fraction form
    21,336.91/29,442.69 = 12,382.67/x
  3. Step 3: Cross multiply
    21,336.91x = 29,442.69 × 12,382.67
  4. Step 4: Simplify right side
    21,336.91x = 364,579,187.79
  5. Step 5: Solve for x
    x = 364,579,187.79/21,336.91
  6. Step 6: Final answer
    x = 17,086.79

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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.