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Finding the Fourth Proportional to 8,420.99, 12,631.47 and 2,577.61

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Solution

The fourth proportional to 8,420.99, 12,631.47 and 2,577.61 is: 3,866.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,420.99 : 12,631.47 = 2,577.61 : x
  2. Step 2: Convert to fraction form
    8,420.99/12,631.47 = 2,577.61/x
  3. Step 3: Cross multiply
    8,420.99x = 12,631.47 × 2,577.61
  4. Step 4: Simplify right side
    8,420.99x = 32,559,003.39
  5. Step 5: Solve for x
    x = 32,559,003.39/8,420.99
  6. Step 6: Final answer
    x = 3,866.41

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Double scale
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Similar ratio
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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.