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Finding the Fourth Proportional to 13,603.68, 18,772.76 and 7,635.60

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Solution

The fourth proportional to 13,603.68, 18,772.76 and 7,635.60 is: 10,536.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,603.68 : 18,772.76 = 7,635.60 : x
  2. Step 2: Convert to fraction form
    13,603.68/18,772.76 = 7,635.60/x
  3. Step 3: Cross multiply
    13,603.68x = 18,772.76 × 7,635.60
  4. Step 4: Simplify right side
    13,603.68x = 143,341,305.35
  5. Step 5: Solve for x
    x = 143,341,305.35/13,603.68
  6. Step 6: Final answer
    x = 10,536.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.