Home / 21,243.76-29,315.79-11,683.69

Finding the Fourth Proportional to 21,243.76, 29,315.79 and 11,683.69

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Solution

The fourth proportional to 21,243.76, 29,315.79 and 11,683.69 is: 16,123.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,243.76 : 29,315.79 = 11,683.69 : x
  2. Step 2: Convert to fraction form
    21,243.76/29,315.79 = 11,683.69/x
  3. Step 3: Cross multiply
    21,243.76x = 29,315.79 × 11,683.69
  4. Step 4: Simplify right side
    21,243.76x = 342,516,529.18
  5. Step 5: Solve for x
    x = 342,516,529.18/21,243.76
  6. Step 6: Final answer
    x = 16,123.16

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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.