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Finding the Fourth Proportional to 21,807.86, 32,685.39 and 9,945.39

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Solution

The fourth proportional to 21,807.86, 32,685.39 and 9,945.39 is: 14,906.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,807.86 : 32,685.39 = 9,945.39 : x
  2. Step 2: Convert to fraction form
    21,807.86/32,685.39 = 9,945.39/x
  3. Step 3: Cross multiply
    21,807.86x = 32,685.39 × 9,945.39
  4. Step 4: Simplify right side
    21,807.86x = 325,068,950.85
  5. Step 5: Solve for x
    x = 325,068,950.85/21,807.86
  6. Step 6: Final answer
    x = 14,906.05

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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.