Home / 13,455.70-20,151.42-10,663.90

Finding the Fourth Proportional to 13,455.70, 20,151.42 and 10,663.90

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Solution

The fourth proportional to 13,455.70, 20,151.42 and 10,663.90 is: 15,970.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,455.70 : 20,151.42 = 10,663.90 : x
  2. Step 2: Convert to fraction form
    13,455.70/20,151.42 = 10,663.90/x
  3. Step 3: Cross multiply
    13,455.70x = 20,151.42 × 10,663.90
  4. Step 4: Simplify right side
    13,455.70x = 214,892,727.74
  5. Step 5: Solve for x
    x = 214,892,727.74/13,455.70
  6. Step 6: Final answer
    x = 15,970.39

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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.