Home / 21,378.84-29,495.60-13,834.71

Finding the Fourth Proportional to 21,378.84, 29,495.60 and 13,834.71

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Solution

The fourth proportional to 21,378.84, 29,495.60 and 13,834.71 is: 19,087.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,378.84 : 29,495.60 = 13,834.71 : x
  2. Step 2: Convert to fraction form
    21,378.84/29,495.60 = 13,834.71/x
  3. Step 3: Cross multiply
    21,378.84x = 29,495.60 × 13,834.71
  4. Step 4: Simplify right side
    21,378.84x = 408,063,003.10
  5. Step 5: Solve for x
    x = 408,063,003.10/21,378.84
  6. Step 6: Final answer
    x = 19,087.24

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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.