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Finding the Fourth Proportional to 15,757.76, 21,755.04 and 14,008.32

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Solution

The fourth proportional to 15,757.76, 21,755.04 and 14,008.32 is: 19,339.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,757.76 : 21,755.04 = 14,008.32 : x
  2. Step 2: Convert to fraction form
    15,757.76/21,755.04 = 14,008.32/x
  3. Step 3: Cross multiply
    15,757.76x = 21,755.04 × 14,008.32
  4. Step 4: Simplify right side
    15,757.76x = 304,751,561.93
  5. Step 5: Solve for x
    x = 304,751,561.93/15,757.76
  6. Step 6: Final answer
    x = 19,339.78

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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.