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Finding the Fourth Proportional to 20,548.60, 30,805.62 and 10,666.60

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Solution

The fourth proportional to 20,548.60, 30,805.62 and 10,666.60 is: 15,990.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,548.60 : 30,805.62 = 10,666.60 : x
  2. Step 2: Convert to fraction form
    20,548.60/30,805.62 = 10,666.60/x
  3. Step 3: Cross multiply
    20,548.60x = 30,805.62 × 10,666.60
  4. Step 4: Simplify right side
    20,548.60x = 328,591,226.29
  5. Step 5: Solve for x
    x = 328,591,226.29/20,548.60
  6. Step 6: Final answer
    x = 15,990.93

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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.