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Finding the Fourth Proportional to 11,125.70, 16,688.55 and 10,615.40

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Solution

The fourth proportional to 11,125.70, 16,688.55 and 10,615.40 is: 15,923.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,125.70 : 16,688.55 = 10,615.40 : x
  2. Step 2: Convert to fraction form
    11,125.70/16,688.55 = 10,615.40/x
  3. Step 3: Cross multiply
    11,125.70x = 16,688.55 × 10,615.40
  4. Step 4: Simplify right side
    11,125.70x = 177,155,633.67
  5. Step 5: Solve for x
    x = 177,155,633.67/11,125.70
  6. Step 6: Final answer
    x = 15,923.10

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Similar ratio
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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.