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Finding the Fourth Proportional to 29,624.84, 40,868.34 and 21,128.84

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Solution

The fourth proportional to 29,624.84, 40,868.34 and 21,128.84 is: 29,147.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,624.84 : 40,868.34 = 21,128.84 : x
  2. Step 2: Convert to fraction form
    29,624.84/40,868.34 = 21,128.84/x
  3. Step 3: Cross multiply
    29,624.84x = 40,868.34 × 21,128.84
  4. Step 4: Simplify right side
    29,624.84x = 863,500,616.93
  5. Step 5: Solve for x
    x = 863,500,616.93/29,624.84
  6. Step 6: Final answer
    x = 29,147.86

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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.