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Finding the Fourth Proportional to 20,358.86, 30,557.99 and 9,836.28

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Solution

The fourth proportional to 20,358.86, 30,557.99 and 9,836.28 is: 14,763.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,358.86 : 30,557.99 = 9,836.28 : x
  2. Step 2: Convert to fraction form
    20,358.86/30,557.99 = 9,836.28/x
  3. Step 3: Cross multiply
    20,358.86x = 30,557.99 × 9,836.28
  4. Step 4: Simplify right side
    20,358.86x = 300,576,970.47
  5. Step 5: Solve for x
    x = 300,576,970.47/20,358.86
  6. Step 6: Final answer
    x = 14,763.94

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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.