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Finding the Fourth Proportional to 20,276.40, 28,321.35 and 20,276.40

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Solution

The fourth proportional to 20,276.40, 28,321.35 and 20,276.40 is: 28,321.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,276.40 : 28,321.35 = 20,276.40 : x
  2. Step 2: Convert to fraction form
    20,276.40/28,321.35 = 20,276.40/x
  3. Step 3: Cross multiply
    20,276.40x = 28,321.35 × 20,276.40
  4. Step 4: Simplify right side
    20,276.40x = 574,255,021.14
  5. Step 5: Solve for x
    x = 574,255,021.14/20,276.40
  6. Step 6: Final answer
    x = 28,321.35

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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.