Home / 15,321.36-21,145.77-9,356.49

Finding the Fourth Proportional to 15,321.36, 21,145.77 and 9,356.49

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Solution

The fourth proportional to 15,321.36, 21,145.77 and 9,356.49 is: 12,913.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,321.36 : 21,145.77 = 9,356.49 : x
  2. Step 2: Convert to fraction form
    15,321.36/21,145.77 = 9,356.49/x
  3. Step 3: Cross multiply
    15,321.36x = 21,145.77 × 9,356.49
  4. Step 4: Simplify right side
    15,321.36x = 197,850,185.55
  5. Step 5: Solve for x
    x = 197,850,185.55/15,321.36
  6. Step 6: Final answer
    x = 12,913.36

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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.