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Finding the Fourth Proportional to 21,048.40, 29,048.84 and 15,733.99

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Solution

The fourth proportional to 21,048.40, 29,048.84 and 15,733.99 is: 21,714.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,048.40 : 29,048.84 = 15,733.99 : x
  2. Step 2: Convert to fraction form
    21,048.40/29,048.84 = 15,733.99/x
  3. Step 3: Cross multiply
    21,048.40x = 29,048.84 × 15,733.99
  4. Step 4: Simplify right side
    21,048.40x = 457,054,158.07
  5. Step 5: Solve for x
    x = 457,054,158.07/21,048.40
  6. Step 6: Final answer
    x = 21,714.44

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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.