Home / 30,939.20-42,695.88-16,791.68

Finding the Fourth Proportional to 30,939.20, 42,695.88 and 16,791.68

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Solution

The fourth proportional to 30,939.20, 42,695.88 and 16,791.68 is: 23,172.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,939.20 : 42,695.88 = 16,791.68 : x
  2. Step 2: Convert to fraction form
    30,939.20/42,695.88 = 16,791.68/x
  3. Step 3: Cross multiply
    30,939.20x = 42,695.88 × 16,791.68
  4. Step 4: Simplify right side
    30,939.20x = 716,935,554.28
  5. Step 5: Solve for x
    x = 716,935,554.28/30,939.20
  6. Step 6: Final answer
    x = 23,172.40

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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.