Home / 19,679.20-27,128.64-14,955.28

Finding the Fourth Proportional to 19,679.20, 27,128.64 and 14,955.28

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Solution

The fourth proportional to 19,679.20, 27,128.64 and 14,955.28 is: 20,616.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,679.20 : 27,128.64 = 14,955.28 : x
  2. Step 2: Convert to fraction form
    19,679.20/27,128.64 = 14,955.28/x
  3. Step 3: Cross multiply
    19,679.20x = 27,128.64 × 14,955.28
  4. Step 4: Simplify right side
    19,679.20x = 405,716,407.22
  5. Step 5: Solve for x
    x = 405,716,407.22/19,679.20
  6. Step 6: Final answer
    x = 20,616.51

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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.