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Finding the Fourth Proportional to 25,372.48, 34,980.46 and 20,818.48

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Solution

The fourth proportional to 25,372.48, 34,980.46 and 20,818.48 is: 28,701.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,372.48 : 34,980.46 = 20,818.48 : x
  2. Step 2: Convert to fraction form
    25,372.48/34,980.46 = 20,818.48/x
  3. Step 3: Cross multiply
    25,372.48x = 34,980.46 × 20,818.48
  4. Step 4: Simplify right side
    25,372.48x = 728,240,006.90
  5. Step 5: Solve for x
    x = 728,240,006.90/25,372.48
  6. Step 6: Final answer
    x = 28,701.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.