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Finding the Fourth Proportional to 28,270.70, 42,406.05 and 7,494.20

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Solution

The fourth proportional to 28,270.70, 42,406.05 and 7,494.20 is: 11,241.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,270.70 : 42,406.05 = 7,494.20 : x
  2. Step 2: Convert to fraction form
    28,270.70/42,406.05 = 7,494.20/x
  3. Step 3: Cross multiply
    28,270.70x = 42,406.05 × 7,494.20
  4. Step 4: Simplify right side
    28,270.70x = 317,799,419.91
  5. Step 5: Solve for x
    x = 317,799,419.91/28,270.70
  6. Step 6: Final answer
    x = 11,241.30

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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.