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Finding the Fourth Proportional to 13,203.22, 18,220.95 and 7,235.14

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Solution

The fourth proportional to 13,203.22, 18,220.95 and 7,235.14 is: 9,984.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,203.22 : 18,220.95 = 7,235.14 : x
  2. Step 2: Convert to fraction form
    13,203.22/18,220.95 = 7,235.14/x
  3. Step 3: Cross multiply
    13,203.22x = 18,220.95 × 7,235.14
  4. Step 4: Simplify right side
    13,203.22x = 131,831,124.18
  5. Step 5: Solve for x
    x = 131,831,124.18/13,203.22
  6. Step 6: Final answer
    x = 9,984.77

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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.