Home / 21,381.08-29,505.71-11,821.65

Finding the Fourth Proportional to 21,381.08, 29,505.71 and 11,821.65

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Solution

The fourth proportional to 21,381.08, 29,505.71 and 11,821.65 is: 16,313.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,381.08 : 29,505.71 = 11,821.65 : x
  2. Step 2: Convert to fraction form
    21,381.08/29,505.71 = 11,821.65/x
  3. Step 3: Cross multiply
    21,381.08x = 29,505.71 × 11,821.65
  4. Step 4: Simplify right side
    21,381.08x = 348,806,117.51
  5. Step 5: Solve for x
    x = 348,806,117.51/21,381.08
  6. Step 6: Final answer
    x = 16,313.78

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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.