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Finding the Fourth Proportional to 25,286.80, 34,859.80 and 17,316.40

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Solution

The fourth proportional to 25,286.80, 34,859.80 and 17,316.40 is: 23,871.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,286.80 : 34,859.80 = 17,316.40 : x
  2. Step 2: Convert to fraction form
    25,286.80/34,859.80 = 17,316.40/x
  3. Step 3: Cross multiply
    25,286.80x = 34,859.80 × 17,316.40
  4. Step 4: Simplify right side
    25,286.80x = 603,646,240.72
  5. Step 5: Solve for x
    x = 603,646,240.72/25,286.80
  6. Step 6: Final answer
    x = 23,871.99

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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.