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Finding the Fourth Proportional to 25,903.80, 38,855.70 and 20,071.80

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Solution

The fourth proportional to 25,903.80, 38,855.70 and 20,071.80 is: 30,107.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,903.80 : 38,855.70 = 20,071.80 : x
  2. Step 2: Convert to fraction form
    25,903.80/38,855.70 = 20,071.80/x
  3. Step 3: Cross multiply
    25,903.80x = 38,855.70 × 20,071.80
  4. Step 4: Simplify right side
    25,903.80x = 779,903,839.26
  5. Step 5: Solve for x
    x = 779,903,839.26/25,903.80
  6. Step 6: Final answer
    x = 30,107.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.