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Finding the Fourth Proportional to 25,390.60, 38,021.10 and 20,206.60

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Solution

The fourth proportional to 25,390.60, 38,021.10 and 20,206.60 is: 30,258.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,390.60 : 38,021.10 = 20,206.60 : x
  2. Step 2: Convert to fraction form
    25,390.60/38,021.10 = 20,206.60/x
  3. Step 3: Cross multiply
    25,390.60x = 38,021.10 × 20,206.60
  4. Step 4: Simplify right side
    25,390.60x = 768,277,159.26
  5. Step 5: Solve for x
    x = 768,277,159.26/25,390.60
  6. Step 6: Final answer
    x = 30,258.33

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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.