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Finding the Fourth Proportional to 20,699.88, 30,844.16 and 19,695.66

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Solution

The fourth proportional to 20,699.88, 30,844.16 and 19,695.66 is: 29,347.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,699.88 : 30,844.16 = 19,695.66 : x
  2. Step 2: Convert to fraction form
    20,699.88/30,844.16 = 19,695.66/x
  3. Step 3: Cross multiply
    20,699.88x = 30,844.16 × 19,695.66
  4. Step 4: Simplify right side
    20,699.88x = 607,495,989.87
  5. Step 5: Solve for x
    x = 607,495,989.87/20,699.88
  6. Step 6: Final answer
    x = 29,347.80

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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.