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Finding the Fourth Proportional to 21,021, 29,011.04 and 11,589.57

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Solution

The fourth proportional to 21,021, 29,011.04 and 11,589.57 is: 15,994.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,021 : 29,011.04 = 11,589.57 : x
  2. Step 2: Convert to fraction form
    21,021/29,011.04 = 11,589.57/x
  3. Step 3: Cross multiply
    21,021x = 29,011.04 × 11,589.57
  4. Step 4: Simplify right side
    21,021x = 336,225,420.90
  5. Step 5: Solve for x
    x = 336,225,420.90/21,021
  6. Step 6: Final answer
    x = 15,994.74

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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.