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Finding the Fourth Proportional to 20,225.68, 30,345.72 and 10,369.60

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Solution

The fourth proportional to 20,225.68, 30,345.72 and 10,369.60 is: 15,558.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,225.68 : 30,345.72 = 10,369.60 : x
  2. Step 2: Convert to fraction form
    20,225.68/30,345.72 = 10,369.60/x
  3. Step 3: Cross multiply
    20,225.68x = 30,345.72 × 10,369.60
  4. Step 4: Simplify right side
    20,225.68x = 314,672,978.11
  5. Step 5: Solve for x
    x = 314,672,978.11/20,225.68
  6. Step 6: Final answer
    x = 15,558.09

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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.