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Finding the Fourth Proportional to 21,047.63, 29,046.13 and 11,615.99

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Solution

The fourth proportional to 21,047.63, 29,046.13 and 11,615.99 is: 16,030.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,047.63 : 29,046.13 = 11,615.99 : x
  2. Step 2: Convert to fraction form
    21,047.63/29,046.13 = 11,615.99/x
  3. Step 3: Cross multiply
    21,047.63x = 29,046.13 × 11,615.99
  4. Step 4: Simplify right side
    21,047.63x = 337,399,381.35
  5. Step 5: Solve for x
    x = 337,399,381.35/21,047.63
  6. Step 6: Final answer
    x = 16,030.28

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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.