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Finding the Fourth Proportional to 21,358.99, 29,474.88 and 11,799.67

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Solution

The fourth proportional to 21,358.99, 29,474.88 and 11,799.67 is: 16,283.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,358.99 : 29,474.88 = 11,799.67 : x
  2. Step 2: Convert to fraction form
    21,358.99/29,474.88 = 11,799.67/x
  3. Step 3: Cross multiply
    21,358.99x = 29,474.88 × 11,799.67
  4. Step 4: Simplify right side
    21,358.99x = 347,793,827.81
  5. Step 5: Solve for x
    x = 347,793,827.81/21,358.99
  6. Step 6: Final answer
    x = 16,283.26

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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.