Home / 21,511.10-29,693.79-13,551.84

Finding the Fourth Proportional to 21,511.10, 29,693.79 and 13,551.84

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Solution

The fourth proportional to 21,511.10, 29,693.79 and 13,551.84 is: 18,706.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,511.10 : 29,693.79 = 13,551.84 : x
  2. Step 2: Convert to fraction form
    21,511.10/29,693.79 = 13,551.84/x
  3. Step 3: Cross multiply
    21,511.10x = 29,693.79 × 13,551.84
  4. Step 4: Simplify right side
    21,511.10x = 402,405,491.07
  5. Step 5: Solve for x
    x = 402,405,491.07/21,511.10
  6. Step 6: Final answer
    x = 18,706.87

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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.