Home / 15,916.44-21,970.56-13,669.28

Finding the Fourth Proportional to 15,916.44, 21,970.56 and 13,669.28

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Solution

The fourth proportional to 15,916.44, 21,970.56 and 13,669.28 is: 18,868.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,916.44 : 21,970.56 = 13,669.28 : x
  2. Step 2: Convert to fraction form
    15,916.44/21,970.56 = 13,669.28/x
  3. Step 3: Cross multiply
    15,916.44x = 21,970.56 × 13,669.28
  4. Step 4: Simplify right side
    15,916.44x = 300,321,736.40
  5. Step 5: Solve for x
    x = 300,321,736.40/15,916.44
  6. Step 6: Final answer
    x = 18,868.65

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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.