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Finding the Fourth Proportional to 22,455, 30,987.48 and 12,384.36

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Solution

The fourth proportional to 22,455, 30,987.48 and 12,384.36 is: 17,090.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,455 : 30,987.48 = 12,384.36 : x
  2. Step 2: Convert to fraction form
    22,455/30,987.48 = 12,384.36/x
  3. Step 3: Cross multiply
    22,455x = 30,987.48 × 12,384.36
  4. Step 4: Simplify right side
    22,455x = 383,760,107.81
  5. Step 5: Solve for x
    x = 383,760,107.81/22,455
  6. Step 6: Final answer
    x = 17,090.19

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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.