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Finding the Fourth Proportional to 20,266.90, 28,308.05 and 20,266.90

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Solution

The fourth proportional to 20,266.90, 28,308.05 and 20,266.90 is: 28,308.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,266.90 : 28,308.05 = 20,266.90 : x
  2. Step 2: Convert to fraction form
    20,266.90/28,308.05 = 20,266.90/x
  3. Step 3: Cross multiply
    20,266.90x = 28,308.05 × 20,266.90
  4. Step 4: Simplify right side
    20,266.90x = 573,716,418.55
  5. Step 5: Solve for x
    x = 573,716,418.55/20,266.90
  6. Step 6: Final answer
    x = 28,308.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.