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Finding the Fourth Proportional to 15,160.87, 20,923.14 and 8,789.14

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Solution

The fourth proportional to 15,160.87, 20,923.14 and 8,789.14 is: 12,129.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,160.87 : 20,923.14 = 8,789.14 : x
  2. Step 2: Convert to fraction form
    15,160.87/20,923.14 = 8,789.14/x
  3. Step 3: Cross multiply
    15,160.87x = 20,923.14 × 8,789.14
  4. Step 4: Simplify right side
    15,160.87x = 183,896,406.70
  5. Step 5: Solve for x
    x = 183,896,406.70/15,160.87
  6. Step 6: Final answer
    x = 12,129.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.