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Finding the Fourth Proportional to 25,694.80, 35,417.80 and 20,970.96

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Solution

The fourth proportional to 25,694.80, 35,417.80 and 20,970.96 is: 28,906.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,694.80 : 35,417.80 = 20,970.96 : x
  2. Step 2: Convert to fraction form
    25,694.80/35,417.80 = 20,970.96/x
  3. Step 3: Cross multiply
    25,694.80x = 35,417.80 × 20,970.96
  4. Step 4: Simplify right side
    25,694.80x = 742,745,267.09
  5. Step 5: Solve for x
    x = 742,745,267.09/25,694.80
  6. Step 6: Final answer
    x = 28,906.44

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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.