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Finding the Fourth Proportional to 13,603.40, 20,406.96 and 4,836.20

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Solution

The fourth proportional to 13,603.40, 20,406.96 and 4,836.20 is: 7,254.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,603.40 : 20,406.96 = 4,836.20 : x
  2. Step 2: Convert to fraction form
    13,603.40/20,406.96 = 4,836.20/x
  3. Step 3: Cross multiply
    13,603.40x = 20,406.96 × 4,836.20
  4. Step 4: Simplify right side
    13,603.40x = 98,692,139.95
  5. Step 5: Solve for x
    x = 98,692,139.95/13,603.40
  6. Step 6: Final answer
    x = 7,254.96

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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.