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Finding the Fourth Proportional to 21,369.30, 29,858.70 and 21,369.30

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Solution

The fourth proportional to 21,369.30, 29,858.70 and 21,369.30 is: 29,858.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,369.30 : 29,858.70 = 21,369.30 : x
  2. Step 2: Convert to fraction form
    21,369.30/29,858.70 = 21,369.30/x
  3. Step 3: Cross multiply
    21,369.30x = 29,858.70 × 21,369.30
  4. Step 4: Simplify right side
    21,369.30x = 638,059,517.91
  5. Step 5: Solve for x
    x = 638,059,517.91/21,369.30
  6. Step 6: Final answer
    x = 29,858.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.