Home / 13,886.36-19,167.20-7,921.28

Finding the Fourth Proportional to 13,886.36, 19,167.20 and 7,921.28

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Solution

The fourth proportional to 13,886.36, 19,167.20 and 7,921.28 is: 10,933.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,886.36 : 19,167.20 = 7,921.28 : x
  2. Step 2: Convert to fraction form
    13,886.36/19,167.20 = 7,921.28/x
  3. Step 3: Cross multiply
    13,886.36x = 19,167.20 × 7,921.28
  4. Step 4: Simplify right side
    13,886.36x = 151,828,758.02
  5. Step 5: Solve for x
    x = 151,828,758.02/13,886.36
  6. Step 6: Final answer
    x = 10,933.66

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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.