Home / 30,871.44-42,588.66-18,125.40

Finding the Fourth Proportional to 30,871.44, 42,588.66 and 18,125.40

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Solution

The fourth proportional to 30,871.44, 42,588.66 and 18,125.40 is: 25,004.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,871.44 : 42,588.66 = 18,125.40 : x
  2. Step 2: Convert to fraction form
    30,871.44/42,588.66 = 18,125.40/x
  3. Step 3: Cross multiply
    30,871.44x = 42,588.66 × 18,125.40
  4. Step 4: Simplify right side
    30,871.44x = 771,936,497.96
  5. Step 5: Solve for x
    x = 771,936,497.96/30,871.44
  6. Step 6: Final answer
    x = 25,004.87

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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.