Home / 21,478.13-29,639.81-12,049.73

Finding the Fourth Proportional to 21,478.13, 29,639.81 and 12,049.73

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Solution

The fourth proportional to 21,478.13, 29,639.81 and 12,049.73 is: 16,628.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,478.13 : 29,639.81 = 12,049.73 : x
  2. Step 2: Convert to fraction form
    21,478.13/29,639.81 = 12,049.73/x
  3. Step 3: Cross multiply
    21,478.13x = 29,639.81 × 12,049.73
  4. Step 4: Simplify right side
    21,478.13x = 357,151,707.75
  5. Step 5: Solve for x
    x = 357,151,707.75/21,478.13
  6. Step 6: Final answer
    x = 16,628.62

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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.