Home / 13,404.76-18,491.70-8,690.56

Finding the Fourth Proportional to 13,404.76, 18,491.70 and 8,690.56

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Solution

The fourth proportional to 13,404.76, 18,491.70 and 8,690.56 is: 11,988.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,404.76 : 18,491.70 = 8,690.56 : x
  2. Step 2: Convert to fraction form
    13,404.76/18,491.70 = 8,690.56/x
  3. Step 3: Cross multiply
    13,404.76x = 18,491.70 × 8,690.56
  4. Step 4: Simplify right side
    13,404.76x = 160,703,228.35
  5. Step 5: Solve for x
    x = 160,703,228.35/13,404.76
  6. Step 6: Final answer
    x = 11,988.52

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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.