Home / 21,315.87-29,416.23-11,755.71

Finding the Fourth Proportional to 21,315.87, 29,416.23 and 11,755.71

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Solution

The fourth proportional to 21,315.87, 29,416.23 and 11,755.71 is: 16,223.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,315.87 : 29,416.23 = 11,755.71 : x
  2. Step 2: Convert to fraction form
    21,315.87/29,416.23 = 11,755.71/x
  3. Step 3: Cross multiply
    21,315.87x = 29,416.23 × 11,755.71
  4. Step 4: Simplify right side
    21,315.87x = 345,808,669.17
  5. Step 5: Solve for x
    x = 345,808,669.17/21,315.87
  6. Step 6: Final answer
    x = 16,223.06

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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.