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Finding the Fourth Proportional to 20,703.56, 30,995.12 and 18,566.40

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Solution

The fourth proportional to 20,703.56, 30,995.12 and 18,566.40 is: 27,795.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,703.56 : 30,995.12 = 18,566.40 : x
  2. Step 2: Convert to fraction form
    20,703.56/30,995.12 = 18,566.40/x
  3. Step 3: Cross multiply
    20,703.56x = 30,995.12 × 18,566.40
  4. Step 4: Simplify right side
    20,703.56x = 575,467,795.97
  5. Step 5: Solve for x
    x = 575,467,795.97/20,703.56
  6. Step 6: Final answer
    x = 27,795.60

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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.