Home / 13,918.36-20,875.32-5,151.28

Finding the Fourth Proportional to 13,918.36, 20,875.32 and 5,151.28

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Solution

The fourth proportional to 13,918.36, 20,875.32 and 5,151.28 is: 7,726.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,918.36 : 20,875.32 = 5,151.28 : x
  2. Step 2: Convert to fraction form
    13,918.36/20,875.32 = 5,151.28/x
  3. Step 3: Cross multiply
    13,918.36x = 20,875.32 × 5,151.28
  4. Step 4: Simplify right side
    13,918.36x = 107,534,618.41
  5. Step 5: Solve for x
    x = 107,534,618.41/13,918.36
  6. Step 6: Final answer
    x = 7,726.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.