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Finding the Fourth Proportional to 20,548.64, 30,818.64 and 7,399.28

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Solution

The fourth proportional to 20,548.64, 30,818.64 and 7,399.28 is: 11,097.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,548.64 : 30,818.64 = 7,399.28 : x
  2. Step 2: Convert to fraction form
    20,548.64/30,818.64 = 7,399.28/x
  3. Step 3: Cross multiply
    20,548.64x = 30,818.64 × 7,399.28
  4. Step 4: Simplify right side
    20,548.64x = 228,035,746.58
  5. Step 5: Solve for x
    x = 228,035,746.58/20,548.64
  6. Step 6: Final answer
    x = 11,097.36

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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.