Home / 21,378.92-29,502.42-11,948.36

Finding the Fourth Proportional to 21,378.92, 29,502.42 and 11,948.36

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Solution

The fourth proportional to 21,378.92, 29,502.42 and 11,948.36 is: 16,488.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,378.92 : 29,502.42 = 11,948.36 : x
  2. Step 2: Convert to fraction form
    21,378.92/29,502.42 = 11,948.36/x
  3. Step 3: Cross multiply
    21,378.92x = 29,502.42 × 11,948.36
  4. Step 4: Simplify right side
    21,378.92x = 352,505,535.03
  5. Step 5: Solve for x
    x = 352,505,535.03/21,378.92
  6. Step 6: Final answer
    x = 16,488.46

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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.