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Finding the Fourth Proportional to 12,603.76, 18,909.33 and 5,208.64

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Solution

The fourth proportional to 12,603.76, 18,909.33 and 5,208.64 is: 7,814.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,603.76 : 18,909.33 = 5,208.64 : x
  2. Step 2: Convert to fraction form
    12,603.76/18,909.33 = 5,208.64/x
  3. Step 3: Cross multiply
    12,603.76x = 18,909.33 × 5,208.64
  4. Step 4: Simplify right side
    12,603.76x = 98,491,892.61
  5. Step 5: Solve for x
    x = 98,491,892.61/12,603.76
  6. Step 6: Final answer
    x = 7,814.48

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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.