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Finding the Fourth Proportional to 20,168.40, 30,256.65 and 16,904.10

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Solution

The fourth proportional to 20,168.40, 30,256.65 and 16,904.10 is: 25,359.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,168.40 : 30,256.65 = 16,904.10 : x
  2. Step 2: Convert to fraction form
    20,168.40/30,256.65 = 16,904.10/x
  3. Step 3: Cross multiply
    20,168.40x = 30,256.65 × 16,904.10
  4. Step 4: Simplify right side
    20,168.40x = 511,461,437.27
  5. Step 5: Solve for x
    x = 511,461,437.27/20,168.40
  6. Step 6: Final answer
    x = 25,359.54

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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.