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Finding the Fourth Proportional to 20,485.88, 30,700.24 and 15,484.12

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Solution

The fourth proportional to 20,485.88, 30,700.24 and 15,484.12 is: 23,204.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,485.88 : 30,700.24 = 15,484.12 : x
  2. Step 2: Convert to fraction form
    20,485.88/30,700.24 = 15,484.12/x
  3. Step 3: Cross multiply
    20,485.88x = 30,700.24 × 15,484.12
  4. Step 4: Simplify right side
    20,485.88x = 475,366,200.19
  5. Step 5: Solve for x
    x = 475,366,200.19/20,485.88
  6. Step 6: Final answer
    x = 23,204.58

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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.