Home / 21,688.29-29,928.36-12,256.23

Finding the Fourth Proportional to 21,688.29, 29,928.36 and 12,256.23

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Solution

The fourth proportional to 21,688.29, 29,928.36 and 12,256.23 is: 16,912.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,688.29 : 29,928.36 = 12,256.23 : x
  2. Step 2: Convert to fraction form
    21,688.29/29,928.36 = 12,256.23/x
  3. Step 3: Cross multiply
    21,688.29x = 29,928.36 × 12,256.23
  4. Step 4: Simplify right side
    21,688.29x = 366,808,863.68
  5. Step 5: Solve for x
    x = 366,808,863.68/21,688.29
  6. Step 6: Final answer
    x = 16,912.76

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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.