Home / 10,898.40-16,366.80-8,439.20

Finding the Fourth Proportional to 10,898.40, 16,366.80 and 8,439.20

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Solution

The fourth proportional to 10,898.40, 16,366.80 and 8,439.20 is: 12,673.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,898.40 : 16,366.80 = 8,439.20 : x
  2. Step 2: Convert to fraction form
    10,898.40/16,366.80 = 8,439.20/x
  3. Step 3: Cross multiply
    10,898.40x = 16,366.80 × 8,439.20
  4. Step 4: Simplify right side
    10,898.40x = 138,122,698.56
  5. Step 5: Solve for x
    x = 138,122,698.56/10,898.40
  6. Step 6: Final answer
    x = 12,673.67

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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.