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Finding the Fourth Proportional to 11,818.60, 17,706.30 and 9,615.40

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Solution

The fourth proportional to 11,818.60, 17,706.30 and 9,615.40 is: 14,405.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,818.60 : 17,706.30 = 9,615.40 : x
  2. Step 2: Convert to fraction form
    11,818.60/17,706.30 = 9,615.40/x
  3. Step 3: Cross multiply
    11,818.60x = 17,706.30 × 9,615.40
  4. Step 4: Simplify right side
    11,818.60x = 170,253,157.02
  5. Step 5: Solve for x
    x = 170,253,157.02/11,818.60
  6. Step 6: Final answer
    x = 14,405.53

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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.