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Finding the Fourth Proportional to 21,759.40, 30,042.40 and 16,714.60

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Solution

The fourth proportional to 21,759.40, 30,042.40 and 16,714.60 is: 23,077.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,759.40 : 30,042.40 = 16,714.60 : x
  2. Step 2: Convert to fraction form
    21,759.40/30,042.40 = 16,714.60/x
  3. Step 3: Cross multiply
    21,759.40x = 30,042.40 × 16,714.60
  4. Step 4: Simplify right side
    21,759.40x = 502,146,699.04
  5. Step 5: Solve for x
    x = 502,146,699.04/21,759.40
  6. Step 6: Final answer
    x = 23,077.23

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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.