Home / 15,721.36-21,669.48-10,683.28

Finding the Fourth Proportional to 15,721.36, 21,669.48 and 10,683.28

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Solution

The fourth proportional to 15,721.36, 21,669.48 and 10,683.28 is: 14,725.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,721.36 : 21,669.48 = 10,683.28 : x
  2. Step 2: Convert to fraction form
    15,721.36/21,669.48 = 10,683.28/x
  3. Step 3: Cross multiply
    15,721.36x = 21,669.48 × 10,683.28
  4. Step 4: Simplify right side
    15,721.36x = 231,501,122.29
  5. Step 5: Solve for x
    x = 231,501,122.29/15,721.36
  6. Step 6: Final answer
    x = 14,725.26

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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.