Home / 30,884.50-42,622.74-18,789.70

Finding the Fourth Proportional to 30,884.50, 42,622.74 and 18,789.70

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Solution

The fourth proportional to 30,884.50, 42,622.74 and 18,789.70 is: 25,931.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,884.50 : 42,622.74 = 18,789.70 : x
  2. Step 2: Convert to fraction form
    30,884.50/42,622.74 = 18,789.70/x
  3. Step 3: Cross multiply
    30,884.50x = 42,622.74 × 18,789.70
  4. Step 4: Simplify right side
    30,884.50x = 800,868,497.78
  5. Step 5: Solve for x
    x = 800,868,497.78/30,884.50
  6. Step 6: Final answer
    x = 25,931.08

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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.