Home / 15,905.89-21,940.40-11,435.68

Finding the Fourth Proportional to 15,905.89, 21,940.40 and 11,435.68

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Solution

The fourth proportional to 15,905.89, 21,940.40 and 11,435.68 is: 15,774.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,905.89 : 21,940.40 = 11,435.68 : x
  2. Step 2: Convert to fraction form
    15,905.89/21,940.40 = 11,435.68/x
  3. Step 3: Cross multiply
    15,905.89x = 21,940.40 × 11,435.68
  4. Step 4: Simplify right side
    15,905.89x = 250,903,336.29
  5. Step 5: Solve for x
    x = 250,903,336.29/15,905.89
  6. Step 6: Final answer
    x = 15,774.24

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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.