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Finding the Fourth Proportional to 20,653.30, 30,981.14 and 5,861.06

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Solution

The fourth proportional to 20,653.30, 30,981.14 and 5,861.06 is: 8,791.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,653.30 : 30,981.14 = 5,861.06 : x
  2. Step 2: Convert to fraction form
    20,653.30/30,981.14 = 5,861.06/x
  3. Step 3: Cross multiply
    20,653.30x = 30,981.14 × 5,861.06
  4. Step 4: Simplify right side
    20,653.30x = 181,582,320.41
  5. Step 5: Solve for x
    x = 181,582,320.41/20,653.30
  6. Step 6: Final answer
    x = 8,791.93

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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.