Home / 15,505.79-21,398.20-11,618.31

Finding the Fourth Proportional to 15,505.79, 21,398.20 and 11,618.31

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Solution

The fourth proportional to 15,505.79, 21,398.20 and 11,618.31 is: 16,033.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,505.79 : 21,398.20 = 11,618.31 : x
  2. Step 2: Convert to fraction form
    15,505.79/21,398.20 = 11,618.31/x
  3. Step 3: Cross multiply
    15,505.79x = 21,398.20 × 11,618.31
  4. Step 4: Simplify right side
    15,505.79x = 248,610,917.23
  5. Step 5: Solve for x
    x = 248,610,917.23/15,505.79
  6. Step 6: Final answer
    x = 16,033.43

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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.