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Finding the Fourth Proportional to 19,311.46, 28,978.14 and 10,426.67

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Solution

The fourth proportional to 19,311.46, 28,978.14 and 10,426.67 is: 15,645.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,311.46 : 28,978.14 = 10,426.67 : x
  2. Step 2: Convert to fraction form
    19,311.46/28,978.14 = 10,426.67/x
  3. Step 3: Cross multiply
    19,311.46x = 28,978.14 × 10,426.67
  4. Step 4: Simplify right side
    19,311.46x = 302,145,358.10
  5. Step 5: Solve for x
    x = 302,145,358.10/19,311.46
  6. Step 6: Final answer
    x = 15,645.91

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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.