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Finding the Fourth Proportional to 20,021.30, 28,117.30 and 20,021.30

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Solution

The fourth proportional to 20,021.30, 28,117.30 and 20,021.30 is: 28,117.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,021.30 : 28,117.30 = 20,021.30 : x
  2. Step 2: Convert to fraction form
    20,021.30/28,117.30 = 20,021.30/x
  3. Step 3: Cross multiply
    20,021.30x = 28,117.30 × 20,021.30
  4. Step 4: Simplify right side
    20,021.30x = 562,944,898.49
  5. Step 5: Solve for x
    x = 562,944,898.49/20,021.30
  6. Step 6: Final answer
    x = 28,117.30

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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.