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Finding the Fourth Proportional to 12,615.60, 18,923.40 and 11,206.20

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Solution

The fourth proportional to 12,615.60, 18,923.40 and 11,206.20 is: 16,809.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,615.60 : 18,923.40 = 11,206.20 : x
  2. Step 2: Convert to fraction form
    12,615.60/18,923.40 = 11,206.20/x
  3. Step 3: Cross multiply
    12,615.60x = 18,923.40 × 11,206.20
  4. Step 4: Simplify right side
    12,615.60x = 212,059,405.08
  5. Step 5: Solve for x
    x = 212,059,405.08/12,615.60
  6. Step 6: Final answer
    x = 16,809.30

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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.