Home / 30,765.85-42,456.88-16,618.69

Finding the Fourth Proportional to 30,765.85, 42,456.88 and 16,618.69

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Solution

The fourth proportional to 30,765.85, 42,456.88 and 16,618.69 is: 22,933.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,765.85 : 42,456.88 = 16,618.69 : x
  2. Step 2: Convert to fraction form
    30,765.85/42,456.88 = 16,618.69/x
  3. Step 3: Cross multiply
    30,765.85x = 42,456.88 × 16,618.69
  4. Step 4: Simplify right side
    30,765.85x = 705,577,727.09
  5. Step 5: Solve for x
    x = 705,577,727.09/30,765.85
  6. Step 6: Final answer
    x = 22,933.80

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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.