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Finding the Fourth Proportional to 20,420.52, 30,632.76 and 7,941.54

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Solution

The fourth proportional to 20,420.52, 30,632.76 and 7,941.54 is: 11,913.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,420.52 : 30,632.76 = 7,941.54 : x
  2. Step 2: Convert to fraction form
    20,420.52/30,632.76 = 7,941.54/x
  3. Step 3: Cross multiply
    20,420.52x = 30,632.76 × 7,941.54
  4. Step 4: Simplify right side
    20,420.52x = 243,271,288.85
  5. Step 5: Solve for x
    x = 243,271,288.85/20,420.52
  6. Step 6: Final answer
    x = 11,913.08

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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.