Home / 21,478.09-29,639.70-12,046.86

Finding the Fourth Proportional to 21,478.09, 29,639.70 and 12,046.86

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Solution

The fourth proportional to 21,478.09, 29,639.70 and 12,046.86 is: 16,624.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,478.09 : 29,639.70 = 12,046.86 : x
  2. Step 2: Convert to fraction form
    21,478.09/29,639.70 = 12,046.86/x
  3. Step 3: Cross multiply
    21,478.09x = 29,639.70 × 12,046.86
  4. Step 4: Simplify right side
    21,478.09x = 357,065,168.14
  5. Step 5: Solve for x
    x = 357,065,168.14/21,478.09
  6. Step 6: Final answer
    x = 16,624.62

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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.