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Finding the Fourth Proportional to 20,569.34, 30,847.64 and 7,420.01

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Solution

The fourth proportional to 20,569.34, 30,847.64 and 7,420.01 is: 11,127.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,569.34 : 30,847.64 = 7,420.01 : x
  2. Step 2: Convert to fraction form
    20,569.34/30,847.64 = 7,420.01/x
  3. Step 3: Cross multiply
    20,569.34x = 30,847.64 × 7,420.01
  4. Step 4: Simplify right side
    20,569.34x = 228,889,605.94
  5. Step 5: Solve for x
    x = 228,889,605.94/20,569.34
  6. Step 6: Final answer
    x = 11,127.71

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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.