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Finding the Fourth Proportional to 20,391.65, 30,583.81 and 5,598.62

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Solution

The fourth proportional to 20,391.65, 30,583.81 and 5,598.62 is: 8,396.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,391.65 : 30,583.81 = 5,598.62 : x
  2. Step 2: Convert to fraction form
    20,391.65/30,583.81 = 5,598.62/x
  3. Step 3: Cross multiply
    20,391.65x = 30,583.81 × 5,598.62
  4. Step 4: Simplify right side
    20,391.65x = 171,227,130.34
  5. Step 5: Solve for x
    x = 171,227,130.34/20,391.65
  6. Step 6: Final answer
    x = 8,396.92

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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.