Home / 15,495.78-21,383.28-8,422.14

Finding the Fourth Proportional to 15,495.78, 21,383.28 and 8,422.14

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Solution

The fourth proportional to 15,495.78, 21,383.28 and 8,422.14 is: 11,622.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,495.78 : 21,383.28 = 8,422.14 : x
  2. Step 2: Convert to fraction form
    15,495.78/21,383.28 = 8,422.14/x
  3. Step 3: Cross multiply
    15,495.78x = 21,383.28 × 8,422.14
  4. Step 4: Simplify right side
    15,495.78x = 180,092,989.17
  5. Step 5: Solve for x
    x = 180,092,989.17/15,495.78
  6. Step 6: Final answer
    x = 11,622.06

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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.