Home / 11,419.83-15,749.14-7,171.28

Finding the Fourth Proportional to 11,419.83, 15,749.14 and 7,171.28

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Solution

The fourth proportional to 11,419.83, 15,749.14 and 7,171.28 is: 9,889.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,419.83 : 15,749.14 = 7,171.28 : x
  2. Step 2: Convert to fraction form
    11,419.83/15,749.14 = 7,171.28/x
  3. Step 3: Cross multiply
    11,419.83x = 15,749.14 × 7,171.28
  4. Step 4: Simplify right side
    11,419.83x = 112,941,492.70
  5. Step 5: Solve for x
    x = 112,941,492.70/11,419.83
  6. Step 6: Final answer
    x = 9,889.95

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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.