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Finding the Fourth Proportional to 20,632.56, 30,925.80 and 18,971.88

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Solution

The fourth proportional to 20,632.56, 30,925.80 and 18,971.88 is: 28,436.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,632.56 : 30,925.80 = 18,971.88 : x
  2. Step 2: Convert to fraction form
    20,632.56/30,925.80 = 18,971.88/x
  3. Step 3: Cross multiply
    20,632.56x = 30,925.80 × 18,971.88
  4. Step 4: Simplify right side
    20,632.56x = 586,720,566.50
  5. Step 5: Solve for x
    x = 586,720,566.50/20,632.56
  6. Step 6: Final answer
    x = 28,436.63

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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.