Home / 20,156.38-30,082.12-19,631.50

Finding the Fourth Proportional to 20,156.38, 30,082.12 and 19,631.50

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Solution

The fourth proportional to 20,156.38, 30,082.12 and 19,631.50 is: 29,298.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,156.38 : 30,082.12 = 19,631.50 : x
  2. Step 2: Convert to fraction form
    20,156.38/30,082.12 = 19,631.50/x
  3. Step 3: Cross multiply
    20,156.38x = 30,082.12 × 19,631.50
  4. Step 4: Simplify right side
    20,156.38x = 590,557,014.50
  5. Step 5: Solve for x
    x = 590,557,014.50/20,156.38
  6. Step 6: Final answer
    x = 29,298.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.