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Finding the Fourth Proportional to 25,658.99, 35,443.41 and 20,642.11

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Solution

The fourth proportional to 25,658.99, 35,443.41 and 20,642.11 is: 28,513.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,658.99 : 35,443.41 = 20,642.11 : x
  2. Step 2: Convert to fraction form
    25,658.99/35,443.41 = 20,642.11/x
  3. Step 3: Cross multiply
    25,658.99x = 35,443.41 × 20,642.11
  4. Step 4: Simplify right side
    25,658.99x = 731,626,601.98
  5. Step 5: Solve for x
    x = 731,626,601.98/25,658.99
  6. Step 6: Final answer
    x = 28,513.46

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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.