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Finding the Fourth Proportional to 25,713.90, 35,519.18 and 20,696.90

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Solution

The fourth proportional to 25,713.90, 35,519.18 and 20,696.90 is: 28,589.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,713.90 : 35,519.18 = 20,696.90 : x
  2. Step 2: Convert to fraction form
    25,713.90/35,519.18 = 20,696.90/x
  3. Step 3: Cross multiply
    25,713.90x = 35,519.18 × 20,696.90
  4. Step 4: Simplify right side
    25,713.90x = 735,136,635.46
  5. Step 5: Solve for x
    x = 735,136,635.46/25,713.90
  6. Step 6: Final answer
    x = 28,589.08

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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.