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Finding the Fourth Proportional to 12,209.60, 18,314.40 and 10,897.40

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Solution

The fourth proportional to 12,209.60, 18,314.40 and 10,897.40 is: 16,346.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,209.60 : 18,314.40 = 10,897.40 : x
  2. Step 2: Convert to fraction form
    12,209.60/18,314.40 = 10,897.40/x
  3. Step 3: Cross multiply
    12,209.60x = 18,314.40 × 10,897.40
  4. Step 4: Simplify right side
    12,209.60x = 199,579,342.56
  5. Step 5: Solve for x
    x = 199,579,342.56/12,209.60
  6. Step 6: Final answer
    x = 16,346.10

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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.