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Finding the Fourth Proportional to 21,040.08, 29,024.90 and 13,767.90

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Solution

The fourth proportional to 21,040.08, 29,024.90 and 13,767.90 is: 18,992.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,040.08 : 29,024.90 = 13,767.90 : x
  2. Step 2: Convert to fraction form
    21,040.08/29,024.90 = 13,767.90/x
  3. Step 3: Cross multiply
    21,040.08x = 29,024.90 × 13,767.90
  4. Step 4: Simplify right side
    21,040.08x = 399,611,920.71
  5. Step 5: Solve for x
    x = 399,611,920.71/21,040.08
  6. Step 6: Final answer
    x = 18,992.89

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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.