Home / 31,143.08-42,979.20-16,996.16

Finding the Fourth Proportional to 31,143.08, 42,979.20 and 16,996.16

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Solution

The fourth proportional to 31,143.08, 42,979.20 and 16,996.16 is: 23,455.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,143.08 : 42,979.20 = 16,996.16 : x
  2. Step 2: Convert to fraction form
    31,143.08/42,979.20 = 16,996.16/x
  3. Step 3: Cross multiply
    31,143.08x = 42,979.20 × 16,996.16
  4. Step 4: Simplify right side
    31,143.08x = 730,481,359.87
  5. Step 5: Solve for x
    x = 730,481,359.87/31,143.08
  6. Step 6: Final answer
    x = 23,455.66

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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.