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Finding the Fourth Proportional to 26,013.20, 39,019.80 and 20,181.20

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Solution

The fourth proportional to 26,013.20, 39,019.80 and 20,181.20 is: 30,271.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,013.20 : 39,019.80 = 20,181.20 : x
  2. Step 2: Convert to fraction form
    26,013.20/39,019.80 = 20,181.20/x
  3. Step 3: Cross multiply
    26,013.20x = 39,019.80 × 20,181.20
  4. Step 4: Simplify right side
    26,013.20x = 787,466,387.76
  5. Step 5: Solve for x
    x = 787,466,387.76/26,013.20
  6. Step 6: Final answer
    x = 30,271.80

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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.