Home / 13,990.04-21,015.86-8,446.68

Finding the Fourth Proportional to 13,990.04, 21,015.86 and 8,446.68

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Solution

The fourth proportional to 13,990.04, 21,015.86 and 8,446.68 is: 12,688.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,990.04 : 21,015.86 = 8,446.68 : x
  2. Step 2: Convert to fraction form
    13,990.04/21,015.86 = 8,446.68/x
  3. Step 3: Cross multiply
    13,990.04x = 21,015.86 × 8,446.68
  4. Step 4: Simplify right side
    13,990.04x = 177,514,202.11
  5. Step 5: Solve for x
    x = 177,514,202.11/13,990.04
  6. Step 6: Final answer
    x = 12,688.61

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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.