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Finding the Fourth Proportional to 25,370.48, 34,977.70 and 20,816.48

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Solution

The fourth proportional to 25,370.48, 34,977.70 and 20,816.48 is: 28,699.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,370.48 : 34,977.70 = 20,816.48 : x
  2. Step 2: Convert to fraction form
    25,370.48/34,977.70 = 20,816.48/x
  3. Step 3: Cross multiply
    25,370.48x = 34,977.70 × 20,816.48
  4. Step 4: Simplify right side
    25,370.48x = 728,112,592.50
  5. Step 5: Solve for x
    x = 728,112,592.50/25,370.48
  6. Step 6: Final answer
    x = 28,699.20

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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.