Home / 31,087.28-42,899.36-16,939.84

Finding the Fourth Proportional to 31,087.28, 42,899.36 and 16,939.84

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Solution

The fourth proportional to 31,087.28, 42,899.36 and 16,939.84 is: 23,376.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,087.28 : 42,899.36 = 16,939.84 : x
  2. Step 2: Convert to fraction form
    31,087.28/42,899.36 = 16,939.84/x
  3. Step 3: Cross multiply
    31,087.28x = 42,899.36 × 16,939.84
  4. Step 4: Simplify right side
    31,087.28x = 726,708,294.50
  5. Step 5: Solve for x
    x = 726,708,294.50/31,087.28
  6. Step 6: Final answer
    x = 23,376.39

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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.