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Finding the Fourth Proportional to 27,920.20, 39,000.80 and 27,920.20

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Solution

The fourth proportional to 27,920.20, 39,000.80 and 27,920.20 is: 39,000.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,920.20 : 39,000.80 = 27,920.20 : x
  2. Step 2: Convert to fraction form
    27,920.20/39,000.80 = 27,920.20/x
  3. Step 3: Cross multiply
    27,920.20x = 39,000.80 × 27,920.20
  4. Step 4: Simplify right side
    27,920.20x = 1,088,910,136.16
  5. Step 5: Solve for x
    x = 1,088,910,136.16/27,920.20
  6. Step 6: Final answer
    x = 39,000.80

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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.