Home / 30,913.12-42,654.90-18,163.72

Finding the Fourth Proportional to 30,913.12, 42,654.90 and 18,163.72

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Solution

The fourth proportional to 30,913.12, 42,654.90 and 18,163.72 is: 25,062.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,913.12 : 42,654.90 = 18,163.72 : x
  2. Step 2: Convert to fraction form
    30,913.12/42,654.90 = 18,163.72/x
  3. Step 3: Cross multiply
    30,913.12x = 42,654.90 × 18,163.72
  4. Step 4: Simplify right side
    30,913.12x = 774,771,660.23
  5. Step 5: Solve for x
    x = 774,771,660.23/30,913.12
  6. Step 6: Final answer
    x = 25,062.87

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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.