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Finding the Fourth Proportional to 28,193.64, 42,287.08 and 7,418.76

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Solution

The fourth proportional to 28,193.64, 42,287.08 and 7,418.76 is: 11,127.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,193.64 : 42,287.08 = 7,418.76 : x
  2. Step 2: Convert to fraction form
    28,193.64/42,287.08 = 7,418.76/x
  3. Step 3: Cross multiply
    28,193.64x = 42,287.08 × 7,418.76
  4. Step 4: Simplify right side
    28,193.64x = 313,717,697.62
  5. Step 5: Solve for x
    x = 313,717,697.62/28,193.64
  6. Step 6: Final answer
    x = 11,127.25

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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.