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Finding the Fourth Proportional to 13,641, 18,819.18 and 8,603.34

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Solution

The fourth proportional to 13,641, 18,819.18 and 8,603.34 is: 11,869.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,641 : 18,819.18 = 8,603.34 : x
  2. Step 2: Convert to fraction form
    13,641/18,819.18 = 8,603.34/x
  3. Step 3: Cross multiply
    13,641x = 18,819.18 × 8,603.34
  4. Step 4: Simplify right side
    13,641x = 161,907,804.06
  5. Step 5: Solve for x
    x = 161,907,804.06/13,641
  6. Step 6: Final answer
    x = 11,869.20

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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.