Home / 30,900.39-42,646.26-20,156.73

Finding the Fourth Proportional to 30,900.39, 42,646.26 and 20,156.73

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Solution

The fourth proportional to 30,900.39, 42,646.26 and 20,156.73 is: 27,818.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,900.39 : 42,646.26 = 20,156.73 : x
  2. Step 2: Convert to fraction form
    30,900.39/42,646.26 = 20,156.73/x
  3. Step 3: Cross multiply
    30,900.39x = 42,646.26 × 20,156.73
  4. Step 4: Simplify right side
    30,900.39x = 859,609,148.33
  5. Step 5: Solve for x
    x = 859,609,148.33/30,900.39
  6. Step 6: Final answer
    x = 27,818.72

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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.