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Finding the Fourth Proportional to 56,011.60, 84,007.80 and 20,933.20

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Solution

The fourth proportional to 56,011.60, 84,007.80 and 20,933.20 is: 31,396.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,011.60 : 84,007.80 = 20,933.20 : x
  2. Step 2: Convert to fraction form
    56,011.60/84,007.80 = 20,933.20/x
  3. Step 3: Cross multiply
    56,011.60x = 84,007.80 × 20,933.20
  4. Step 4: Simplify right side
    56,011.60x = 1,758,552,078.96
  5. Step 5: Solve for x
    x = 1,758,552,078.96/56,011.60
  6. Step 6: Final answer
    x = 31,396.21

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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.