Home / 31,020.28-42,808.08-16,872.88

Finding the Fourth Proportional to 31,020.28, 42,808.08 and 16,872.88

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Solution

The fourth proportional to 31,020.28, 42,808.08 and 16,872.88 is: 23,284.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,020.28 : 42,808.08 = 16,872.88 : x
  2. Step 2: Convert to fraction form
    31,020.28/42,808.08 = 16,872.88/x
  3. Step 3: Cross multiply
    31,020.28x = 42,808.08 × 16,872.88
  4. Step 4: Simplify right side
    31,020.28x = 722,295,596.87
  5. Step 5: Solve for x
    x = 722,295,596.87/31,020.28
  6. Step 6: Final answer
    x = 23,284.63

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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.