Home / 30,997.44-42,776.64-18,421.92

Finding the Fourth Proportional to 30,997.44, 42,776.64 and 18,421.92

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Solution

The fourth proportional to 30,997.44, 42,776.64 and 18,421.92 is: 25,422.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,997.44 : 42,776.64 = 18,421.92 : x
  2. Step 2: Convert to fraction form
    30,997.44/42,776.64 = 18,421.92/x
  3. Step 3: Cross multiply
    30,997.44x = 42,776.64 × 18,421.92
  4. Step 4: Simplify right side
    30,997.44x = 788,027,839.95
  5. Step 5: Solve for x
    x = 788,027,839.95/30,997.44
  6. Step 6: Final answer
    x = 25,422.35

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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.