Home / 30,765.84-42,456.89-16,618.70

Finding the Fourth Proportional to 30,765.84, 42,456.89 and 16,618.70

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Solution

The fourth proportional to 30,765.84, 42,456.89 and 16,618.70 is: 22,933.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,765.84 : 42,456.89 = 16,618.70 : x
  2. Step 2: Convert to fraction form
    30,765.84/42,456.89 = 16,618.70/x
  3. Step 3: Cross multiply
    30,765.84x = 42,456.89 × 16,618.70
  4. Step 4: Simplify right side
    30,765.84x = 705,578,317.84
  5. Step 5: Solve for x
    x = 705,578,317.84/30,765.84
  6. Step 6: Final answer
    x = 22,933.82

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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.