Home / 30,570.12-42,171.24-19,965.96

Finding the Fourth Proportional to 30,570.12, 42,171.24 and 19,965.96

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Solution

The fourth proportional to 30,570.12, 42,171.24 and 19,965.96 is: 27,542.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,570.12 : 42,171.24 = 19,965.96 : x
  2. Step 2: Convert to fraction form
    30,570.12/42,171.24 = 19,965.96/x
  3. Step 3: Cross multiply
    30,570.12x = 42,171.24 × 19,965.96
  4. Step 4: Simplify right side
    30,570.12x = 841,989,290.99
  5. Step 5: Solve for x
    x = 841,989,290.99/30,570.12
  6. Step 6: Final answer
    x = 27,542.88

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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.