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Finding the Fourth Proportional to 20,755.64, 30,985.66 and 20,026.64

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Solution

The fourth proportional to 20,755.64, 30,985.66 and 20,026.64 is: 29,897.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,755.64 : 30,985.66 = 20,026.64 : x
  2. Step 2: Convert to fraction form
    20,755.64/30,985.66 = 20,026.64/x
  3. Step 3: Cross multiply
    20,755.64x = 30,985.66 × 20,026.64
  4. Step 4: Simplify right side
    20,755.64x = 620,538,657.98
  5. Step 5: Solve for x
    x = 620,538,657.98/20,755.64
  6. Step 6: Final answer
    x = 29,897.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.