Home / 15,469.48-21,345.78-9,178.12

Finding the Fourth Proportional to 15,469.48, 21,345.78 and 9,178.12

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Solution

The fourth proportional to 15,469.48, 21,345.78 and 9,178.12 is: 12,664.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,469.48 : 21,345.78 = 9,178.12 : x
  2. Step 2: Convert to fraction form
    15,469.48/21,345.78 = 9,178.12/x
  3. Step 3: Cross multiply
    15,469.48x = 21,345.78 × 9,178.12
  4. Step 4: Simplify right side
    15,469.48x = 195,914,130.33
  5. Step 5: Solve for x
    x = 195,914,130.33/15,469.48
  6. Step 6: Final answer
    x = 12,664.56

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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.