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Finding the Fourth Proportional to 13,603.45, 20,402.86 and 6,206.17

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Solution

The fourth proportional to 13,603.45, 20,402.86 and 6,206.17 is: 9,308.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,603.45 : 20,402.86 = 6,206.17 : x
  2. Step 2: Convert to fraction form
    13,603.45/20,402.86 = 6,206.17/x
  3. Step 3: Cross multiply
    13,603.45x = 20,402.86 × 6,206.17
  4. Step 4: Simplify right side
    13,603.45x = 126,623,574.40
  5. Step 5: Solve for x
    x = 126,623,574.40/13,603.45
  6. Step 6: Final answer
    x = 9,308.20

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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.