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Finding the Fourth Proportional to 28,002.60, 42,003.90 and 27,808.20

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Solution

The fourth proportional to 28,002.60, 42,003.90 and 27,808.20 is: 41,712.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,002.60 : 42,003.90 = 27,808.20 : x
  2. Step 2: Convert to fraction form
    28,002.60/42,003.90 = 27,808.20/x
  3. Step 3: Cross multiply
    28,002.60x = 42,003.90 × 27,808.20
  4. Step 4: Simplify right side
    28,002.60x = 1,168,052,851.98
  5. Step 5: Solve for x
    x = 1,168,052,851.98/28,002.60
  6. Step 6: Final answer
    x = 41,712.30

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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.