Home / 30,942.75-42,712.08-18,367.50

Finding the Fourth Proportional to 30,942.75, 42,712.08 and 18,367.50

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Solution

The fourth proportional to 30,942.75, 42,712.08 and 18,367.50 is: 25,353.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,942.75 : 42,712.08 = 18,367.50 : x
  2. Step 2: Convert to fraction form
    30,942.75/42,712.08 = 18,367.50/x
  3. Step 3: Cross multiply
    30,942.75x = 42,712.08 × 18,367.50
  4. Step 4: Simplify right side
    30,942.75x = 784,514,129.40
  5. Step 5: Solve for x
    x = 784,514,129.40/30,942.75
  6. Step 6: Final answer
    x = 25,353.73

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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.