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Finding the Fourth Proportional to 21,000.30, 29,439.30 and 21,000.30

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Solution

The fourth proportional to 21,000.30, 29,439.30 and 21,000.30 is: 29,439.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,000.30 : 29,439.30 = 21,000.30 : x
  2. Step 2: Convert to fraction form
    21,000.30/29,439.30 = 21,000.30/x
  3. Step 3: Cross multiply
    21,000.30x = 29,439.30 × 21,000.30
  4. Step 4: Simplify right side
    21,000.30x = 618,234,131.79
  5. Step 5: Solve for x
    x = 618,234,131.79/21,000.30
  6. Step 6: Final answer
    x = 29,439.30

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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.