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Finding the Fourth Proportional to 27,082.60, 40,623.90 and 20,521.60

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Solution

The fourth proportional to 27,082.60, 40,623.90 and 20,521.60 is: 30,782.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,082.60 : 40,623.90 = 20,521.60 : x
  2. Step 2: Convert to fraction form
    27,082.60/40,623.90 = 20,521.60/x
  3. Step 3: Cross multiply
    27,082.60x = 40,623.90 × 20,521.60
  4. Step 4: Simplify right side
    27,082.60x = 833,667,426.24
  5. Step 5: Solve for x
    x = 833,667,426.24/27,082.60
  6. Step 6: Final answer
    x = 30,782.40

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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.