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Finding the Fourth Proportional to 18,113.81, 27,155.02 and 7,012.85

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Solution

The fourth proportional to 18,113.81, 27,155.02 and 7,012.85 is: 10,513.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,113.81 : 27,155.02 = 7,012.85 : x
  2. Step 2: Convert to fraction form
    18,113.81/27,155.02 = 7,012.85/x
  3. Step 3: Cross multiply
    18,113.81x = 27,155.02 × 7,012.85
  4. Step 4: Simplify right side
    18,113.81x = 190,434,082.01
  5. Step 5: Solve for x
    x = 190,434,082.01/18,113.81
  6. Step 6: Final answer
    x = 10,513.20

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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.