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Finding the Fourth Proportional to 30,948.66, 42,708.90 and 16,801.20

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Solution

The fourth proportional to 30,948.66, 42,708.90 and 16,801.20 is: 23,185.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,948.66 : 42,708.90 = 16,801.20 : x
  2. Step 2: Convert to fraction form
    30,948.66/42,708.90 = 16,801.20/x
  3. Step 3: Cross multiply
    30,948.66x = 42,708.90 × 16,801.20
  4. Step 4: Simplify right side
    30,948.66x = 717,560,770.68
  5. Step 5: Solve for x
    x = 717,560,770.68/30,948.66
  6. Step 6: Final answer
    x = 23,185.52

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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.