Home / 30,918.30-42,666.10-16,770.84

Finding the Fourth Proportional to 30,918.30, 42,666.10 and 16,770.84

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Solution

The fourth proportional to 30,918.30, 42,666.10 and 16,770.84 is: 23,143.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,918.30 : 42,666.10 = 16,770.84 : x
  2. Step 2: Convert to fraction form
    30,918.30/42,666.10 = 16,770.84/x
  3. Step 3: Cross multiply
    30,918.30x = 42,666.10 × 16,770.84
  4. Step 4: Simplify right side
    30,918.30x = 715,546,336.52
  5. Step 5: Solve for x
    x = 715,546,336.52/30,918.30
  6. Step 6: Final answer
    x = 23,143.13

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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.