Home / 30,570.45-42,169.34-19,221.98

Finding the Fourth Proportional to 30,570.45, 42,169.34 and 19,221.98

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Solution

The fourth proportional to 30,570.45, 42,169.34 and 19,221.98 is: 26,515.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,570.45 : 42,169.34 = 19,221.98 : x
  2. Step 2: Convert to fraction form
    30,570.45/42,169.34 = 19,221.98/x
  3. Step 3: Cross multiply
    30,570.45x = 42,169.34 × 19,221.98
  4. Step 4: Simplify right side
    30,570.45x = 810,578,047.30
  5. Step 5: Solve for x
    x = 810,578,047.30/30,570.45
  6. Step 6: Final answer
    x = 26,515.09

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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.