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Finding the Fourth Proportional to 10,606.60, 15,909.90 and 3,212.20

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Solution

The fourth proportional to 10,606.60, 15,909.90 and 3,212.20 is: 4,818.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,606.60 : 15,909.90 = 3,212.20 : x
  2. Step 2: Convert to fraction form
    10,606.60/15,909.90 = 3,212.20/x
  3. Step 3: Cross multiply
    10,606.60x = 15,909.90 × 3,212.20
  4. Step 4: Simplify right side
    10,606.60x = 51,105,780.78
  5. Step 5: Solve for x
    x = 51,105,780.78/10,606.60
  6. Step 6: Final answer
    x = 4,818.30

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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.