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Finding the Fourth Proportional to 20,358.42, 30,530.28 and 15,984.42

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Solution

The fourth proportional to 20,358.42, 30,530.28 and 15,984.42 is: 23,970.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,358.42 : 30,530.28 = 15,984.42 : x
  2. Step 2: Convert to fraction form
    20,358.42/30,530.28 = 15,984.42/x
  3. Step 3: Cross multiply
    20,358.42x = 30,530.28 × 15,984.42
  4. Step 4: Simplify right side
    20,358.42x = 488,008,818.24
  5. Step 5: Solve for x
    x = 488,008,818.24/20,358.42
  6. Step 6: Final answer
    x = 23,970.86

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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.