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Finding the Fourth Proportional to 21,658.19, 29,879.39 and 14,586.89

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Solution

The fourth proportional to 21,658.19, 29,879.39 and 14,586.89 is: 20,123.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,658.19 : 29,879.39 = 14,586.89 : x
  2. Step 2: Convert to fraction form
    21,658.19/29,879.39 = 14,586.89/x
  3. Step 3: Cross multiply
    21,658.19x = 29,879.39 × 14,586.89
  4. Step 4: Simplify right side
    21,658.19x = 435,847,262.27
  5. Step 5: Solve for x
    x = 435,847,262.27/21,658.19
  6. Step 6: Final answer
    x = 20,123.91

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Double scale
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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.