Home / 20,513.87-30,770.78-4,931.49

Finding the Fourth Proportional to 20,513.87, 30,770.78 and 4,931.49

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Solution

The fourth proportional to 20,513.87, 30,770.78 and 4,931.49 is: 7,397.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,513.87 : 30,770.78 = 4,931.49 : x
  2. Step 2: Convert to fraction form
    20,513.87/30,770.78 = 4,931.49/x
  3. Step 3: Cross multiply
    20,513.87x = 30,770.78 × 4,931.49
  4. Step 4: Simplify right side
    20,513.87x = 151,745,769.20
  5. Step 5: Solve for x
    x = 151,745,769.20/20,513.87
  6. Step 6: Final answer
    x = 7,397.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.